Luna Platz

Voiced by: Kana Ueda

Luna Platz, known as Luna Shirogane (白金 ルナ, Shirogane Runa) in the Japanese version, is the perky and bossy fifth-grade class president of Echo Ridge Elementary (Kodama Elementary in the Japanese version) and wears a short blue dress with a red necktie and a green greed jewel. In the beginning of the game and anime, she constantly tries to get Geo to come to school, claiming that it is her job to get him there. When Geo finally comes to school, Luna basically treats Geo like another flunky. Luna openly admits she adores Mega Man from the second he saved her. However, throughout the game, it is constantly implied that Luna has developed strong feelings for Geo, stemming from Geo's declaration that he would protect her, and various times other times. Her English last name is a play on her original last name, the kanji of which mean "platinum" (the word "shirogane" means silver). As the class president, most of her friends refer to her as "The Prez", or simply "Prez".

In the anime, Luna was infatuated with Mega Man after he saved her life, though unaware of his secret identity. It was this weakness that she is targeted by "Ophiucus" during one of Sonia's concerts, taking advantage of Luna's desire to see her hero and her jealousy over Lyra Note, who she believes may be romantically involved with Mega Man. Even as "Ophiucus Queen", Luna still had retained her crush on Mega Man, and in the fight with Mega Man, actually flirted with him more than attacking. Luna, after witnessing Mega Man change back to Geo goes into self-denial of seeing it though Zack and Bud were present at the time. Luna also seems to like Geo, making food for him and bickering with Lyra Note over who likes Mega Man more.

In the game, because of her involvements with numerous FM-ian incidents, her parents transferred her to a new school. She keeps this painful news away from her friends. At the mall, she observes Geo and Sonia while they attend a jungle exhibit, and tailed them out of jealously. There she has an unexpected run-in with her parents, and the confrontation prompts Ophiucus to appear before her. Ophiucus promises to make Luna's parents pay, and Luna allows Ophiucus to invade her heart, merging the together to create Ophiucus Queen (オヒュカス・クイーン, Ohyukasu Kuīn). Queen Ophiucus holds Luna's parents hostage demanding Omega-Xis hand over the Andromeda Key. Mega Man eventually beats Queen Ophiucus, but she tries to persuade Omega-Xis to hand over the key so they may use its power together. Omega-Xis refuses, and Ophiucus is defeated by Gemini on a whim. Luna then regains consciousness, and hugs Mega Man as thanks. However, the Wave World deteriorates as they return to the real world, and shows Luna hugging Geo, who ends up being the second human (after Sonia) to know Mega Man's identity. Queen Ophiucus makes a second appearance in Mega Man Star Force 2 as a main story boss. Hyde kidnaps Luna in an attempt to lure Mega Man out. When Mega Man finds Luna, Hyde has Ophiuca's residual waves take over Luna, turning her back into Queen Ophiucus. Upon defeating her, the player unlocks the Tribe-On power.

Bud Bison

Voiced by: Shintaro Ohata (Japanese); Robbie Rist^[9] (English)

Bud Bison, known as Gonta Ushijima (牛島 ゴン太, Ushijima Gonta) in the Japanese version, is a gruff bully who attempts to intimidate Geo into returning to school. Bud is very much like Dex from Battle Network, as he is, at first, he is a bully character who eventually makes amends with the main character. He is quite a dim witted student who depends on Luna to get him out of trouble or explaining things to him. He has a crush on Luna. The last name Ushi means cow or cattle in Japanese. His English adaptation of his last name refers to a Bison.

In Mega Man Star Force, Bud tried to threaten Geo to go to school for Luna. Omega-Xis's brash personality causes Geo to punch Bud, leaving him embarrassed and his companions questioning their association with him, with Luna threatening to cut off their Brother Band, which Bud feels would make him a nobody. Taurus acts on his anguish, offering him the power to get Geo back. Under Taurus' control, Bud begins randomly destroying red objects in the real world. When he, Luna, and Zack go on patrol, they encounter Geo where Bud transforms and escapes into the cyber network of a truck that Luna and Zack are riding in, driving it recklessly through the city, attempting to run Geo over. Afterwards, Bud has little recollection of the incident, only that he did some terrible things.

Taurus Fire reappears in Mega Man Star Force 2 as a main story boss. Taurus's residual waves take over Bud during an eating competition and transform him back into Taurus Fire. He also re-appears in Mega Man Star Force 3 as a Wizard for Bud. Taurus is loaned to Geo to defeat Diamond Ice. He is registered under Project TC as No. 005.

In the anime, he grows jealous over Luna spending so much time with Geo upon his return to school as Taurus (an FM-ian who is number one in terms of power amongst his kind) arrived upon sensing Bud. After being thrown into a hallway by Omega-Xis in the first confrontation, Taurus enters Bud's body and uses him as Taurus Fire until he is defeated and Taurus is forced out of him. Later, Taurus takes on the form of W Bud while gathering minus energy to recreate the Andromeda Key. He is the first FM-ian to be ultimately deleted by Gemini Spark in order to refill the real Andromeda Key with minus energy.

In the manga, Bud encounters a gang of street thugs who bully him and an innocent puppy. Taurus subsequently targets Bud who desires the power to overcome the bullies. However, after being defeated by Mega Man, Taurus becomes an ally of Omega-Xis's and reveals that the "Star Force" will help Geo find his father.

Zack Temple

Voiced by: Yūko Gibu (Japanese); Johnny Yong Bosch (English)

Zack, known as Kizamaro Saishoin (最小院 キザマロ, Saishōin Kizamaro) in the Japanese version, is a nerdy and condescending student who is more or less one of Luna's flunkies. Zack seems to also have a problem with his height and tries numerous ways to get taller. Zack also appears to be afraid of heights. Zack usually gets information off of his own website, the "Zackpedia". After discovering Geo was Mega Man, Zack starts to admire him more. He, Luna, Bud, and Geo usually help test out Tom Dubius's new upgrade for the Star Carrier. Zack is the only one of Geo's immediate friends who has not Wave Changed, against their will or otherwise, though he does get a Wizard named "Pedia" in the third game, thus making a pun with their combined names, "Zackpedia", the name of his website.

Patrick Sprigs

Voiced by: Yuki Kaida

Patrick Sprigs, known as Tsukasa Futaba (双葉 ツカサ, Futaba Tsukasa) in the original Japanese version, was abandoned by parents in a junkyard on Dream Island as an infant; because of that, Pat developed split personality disorder, the other more evil personality named Rey Sprigs, known as Hikaru Futaba (双葉　ヒカル, Futaba Hikaru) in the original version. While generally nice, Pat is pushed by Rey to hate the world, and has also been in contact with Gemini for an extended period prior to Geo's meeting with Omega-Xis. Once merged, Pat and Rey separate into two separate bodies representing the form of Gemini Spark. Pat's personality works as Gemini Spark White, while Rey is personified in Gemini Spark Black. It is their alliance with Gemini that causes Geo to doubt trusting others for a time. His original name is a play on "futagoza", which is the Japanese name for the Gemini constellation.

Gemini Spark appears in the game's sequel at Whazzap Village as a friendly, optional boss. He requests Geo to fight him in order to help gain control over his darker personality Rey. Apparently after beating his SP form, he gains near full control, with Rey only bursting out under stress. This means that Pat now has control over the resurrected Gemini. Pat does not make an appearance in the third game; the only explanation given is that he's "gone," and his empty seat at Echo Elementary is filled by Jack.

In the anime, the Rey personality is virtually absent, with Gemini becoming Gemini Spark Black, and with Pat seemingly a willing participant in the FM Planet's plans. Rescued by Gemini after being run over by a truck and left to die in the ensuing blaze, Pat decided to form an alliance with Gemini. Unlike Geo, Pat had already mastered Electromagnetic Wave Change before they met. Gemini Spark was easily the strongest of the FMains, overwhelming Mega Man in their first two battles, and even in later fights the only Mega Man could win was using the Star Force. Although the other FM-ians plan to destroy Earth, Pat and Gemini secretly intend to destroy the FM Planet by taking the Andromeda Key for themselves. They give Cancer a fake Andromeda key after the real was destroyed by Omega-Xis, telling Cancer that the one they gave him was real (and keeping the real one for themselves) and recreating the EM Wave Conversion System for the FM-ians. Pat and Gemini then remain behind the scenes waiting for the FM-ians to gather enough minus energy for the Andromeda Key. However, the FM-ian king Cepheus eventually calls the FM-ians back to planet FM, and Gemini then betrays the other FM-ians and delete them all except for Cancer, who manage to escape, and use them as energy to restore the Andromeda Key. Gemini Spark White eventually sacrifices his "Black" counterpart to restore fully Andromeda and destroy Earth when the not at full power Andromeda was stopped by the three Sages of AM. However, Geo and Omega-Xis destroyed the Andromeda Key while Cepheus regressed Gemini Spark White back to human form and erased Pat's memories.

In the manga, Gemini Spark only has one embodiment that alternates between the darker, more aggressive Black (B) and the calmer, more mellow White (W). (The two personalities usually dispute over control of the body.) When Gemini Spark was a child, he was abandoned in space and found by Crown Thunder. They shared a bond through their control of lightning, and thus Crown Thunder raised him. Considering Gemini Spark has existed as Gemini Spark since his youth, it is unlikely that Pat and Gemini exist independently in the manga.

Aaron Boreal

Voiced by: Hiroshi Tsuchida

Aaron Boreal, known as Mamoru Amachi (天地 守, Amachi Mamoru) in the Japanese version, is a good friend of Kelvin Stellar, Geo's father. He is the head researcher and founder of AMAKEN (天地研究所, Amachi Kenkyūjo), Aaron delivers the news of Kelvin's disappearance to Geo and his mother, and bestows upon Geo the Visualizer that was left to him by his father. He aids Geo in reaching a space station to prevent the FM King from destroying the Earth by using a transmitter in its debris on Dream Island. He appears in the second game as a minor character, where he upgrades Geo's Star Carrier. In the third game he works in the WAZA command center with fellow AMAKEN employee Tom Dubius, and does his part in helping Geo to get to Meteor G. His English name is a pun on the Aurora Borealis.

Tom Dubius

Voiced by: Norihisa Mori

Tom Dubius, known as Shinsuke Utagai (宇田海 深佑, Utagai Shinsuke) in the Japanese version is a worker at AMAKEN laboratory and is paranoid of those around him. This is due to his past where a man used their brother band to steal his work and presented it as his own. Thus, Tom is afraid to open up to others and have his work stolen, specifically his latest invention, the Flap Pack, a flying pack powered by EM waves. Aaron approaches him asking if he'd like to form a Brother Band, which Tom, while happy at the idea, is still a little doubtful, at which time Cygnus approaches him. When he misunderstands coworker Aaron as claiming the jacket as his own, Cygnus reappears before him, telling him that society's nature is to betray, and together they trap Aaron and the tourists visiting the labs in the Space Simulation chamber (which mimics space, including the room having no oxygen) by forcing them to dance in circles. Hoping to earn Tom's trust, Aaron removes his helmet in the Space Simulation chamber (which, as it turns out, Tom already filled with oxygen), a shocked Dubius realizes the truth, releasing Cygnus' hold over him.

Cygnus Wing reappears in Mega Man Star Force 3 as an optional boss, registered under Project TC as No. 020. Cygnus is now Dubius's wizard.

Tom's anime background is the same as the game, except that Cygnus has him believe that everyone is against him and Tom attempts to crash a satellite on the city in retaliation. Though Tom realized the truth in time, Cygnus took full control over the human's body and escaped. Cygnus acted as the leader of the FM-ians on earth, using Tom to build an "EM Wave Conversion System" that allows his fellow FM-ians to transform into EM Wave Humans without the need for host bodies, directing them to seize the Pegasus, Leo, and Dragon satellites. But eventually, Cygnus reveals his never cared for his minions once he gets the Andromeda Key, almost killing them when he goes to destroy the earth. But eventually, Cygnus was killed by Mega Man.

In the manga, Cygnus Wing appears as an opponent of Mega Man's in the Wave Coliseum tournament. Cygnus Wing's manga personality exhibits a mixture of effeminate mannerisms and slight sadism. Also, Cygnus Wing is lacking his wings for unknown reasons.

FM-ians

Taurus

Voiced by: Nobuyuki Hiyama

Taurus, known as Ox (オックス, Okkusu) in the Japanese version, is based on the constellation Taurus. He is an extremely strong armored bull with the bashfulness of a bull as well. He emits fire to propel himself forward or to burn his enemies. When he fuses with Bud, he becomes Taurus Fire, known as Ox Fire (オックス・ファイア, Okkusu Faia) in the original version. Taurus is later deleted by Gemini. In Tribe, Taurus reappears alive and appears behind Bud as he attends Sonia Strumm's concert with the other FM-ians. He returns in the second game via residual wave data left on Bud, which allowed him to turn back into Taurus Fire unintentionally. He also returns in the third game by order of Cepheus, and makes amends with Bud, becoming his Wizard. He also appears as a Noise Change in the third game.

Cygnus

Voiced by: Nobutoshi Canna

Cygnus (キグナス, Kigunasu) is an FM-ian based on the constellation Cygnus. When he fuses with Tom, they become Cygnus Wing (キグナス・ウィング, Kigunasu Wingu). Cygnus reappears in Mega Man Star Force 3 as a Noise Change for Mega Man, as well as an optional boss, Cygnus' residual data apparently converted to Wizard format for Tom Dubius to use freely with transcode 020.

Gemini

Voiced by: Atsushi Kisaichi

Gemini (ジェミニ, Jemini) is based on the constellation Gemini. When fused with Patrick, they separate into two and become Gemini Spark (ジェミニ・スパーク, Jemini Supāku). After his defeat, Gemini is restored by the FM King Cepheus, along with the other FM warriors. In an attempt to stop Geo and Omega-Xis from going to space and fighting Andromeda, he faces them both, using memory data to re-assume the form of Gemini Spark. However, due to Pat's intervention, Geo and Omega-Xis are able to fight back and destroy Gemini, though he is later revived once again by Cepheus. Pat then rejoins Geo's friends. In the game's final scene, it is revealed that it was Gemini who preyed on Cepheus's paranoia and drove him to destroy the planet AM, thus revealed to be the true antagonist in the game. Mega Man, in the third game, is able to obtain Gemini Noise Change. In Tribe, Gemini reappears alive and appears behind Bud as he attends Sonia Strumm's concert with the other FM-ians.

Libra

Voiced by: Hiroshi Shirokuma

Libra (リブラ, Ribura) is an old, brown-looking FM-ian with a balance for a Torso. He is based on Libra. When he takes over Mitch, they become Libra Scales, known as Libra Balance (リブラ・バランス, Ribura Baransu) in the Japanese version. He is later deleted by Gemini. In Tribe, Libra reappears alive and appears behind Mitch as he attends Sonia Strumm's concert with the other FM-ians. Libra reappears in Mega Man Star Force 3 as a Noise Change.

Wolf

Voiced by: Tokuyoshi Kawashima

Wolf (ウルフ, Urufu) is based on the constellation Wolf (ウルフ, Urufu). When they fuse, they become Wolf Woods, known as Wolf Forest (ウルフ・フォレスト, Urufu Foresto) in the original Japanese version. He is eventually deleted by Gemini Spark for minus energy. In Tribe, Wolf reappears alive and was seen with the other FM-ians attending the concert of Sonia Strumm where he is behind Damian. Wolf reappears as a Noise Change for Mega Man in the third game, as well as an optional boss, with Damion Wolfe registered with Transcode 011.

Crown

Voiced by: Shigenori Sōya

クラウン (Crown, Kuraun)is an FM-ian based on the Corona Borealis. When fused with Jean Couronne's remains, they become Crown Thunder (クラウン・サンダー, Kuraun Sandā). In the game, he is one of three optional bosses in Mega Man Star Force. In the anime, after being defeated, Crown is later able to take the form of W Couronne, but his body is cold and dead with various arrows protruding from it, causing humans to flee at the sight of him. Like Cancer, he was a fan of Sonia. Gemini Spark ultimately deletes him in order to fill the Andromeda Key with minus energy. In Tribe, Crown reappears alive and appears behind Jean's ghost as he attends Sonia Strumm's concert with the other FM-ians. In the manga, Crown Thunder found Gemini Spark when he was a child, and through their bond of lightning, Crown Thunder decided to raise the child. Crown reappears in the third game as a Noise Change for Mega Man.

Virgo

Virgo, is based on the constellation Virgo. When she fuses with Queen Tia, she becomes Queen Virgo, known as Queen Virugo in the original version. She was disguised as Queen Tia's wizard and worked with her. Later, when Geo convinced Queen Tia to surrender her plan to destroy Earth's EM Technology, Virgo turned on her and attempted to destroy. Queen Tia was saved by the timely arrival of Rogue. She is revived by Sirius with the ability to EM Wave Change alone.

Corvus

Corvus, is based on the constellation Corvus. He can EM Wave Change with Jack to become Jack Corvus. He acted as Jack's Wizard for most of the events of Mega Man Star Force 3, but he and Virgo are deleted by Rogue. He is later revived by Sirius with the ability to EM Wave Change without a host.

Ophiuca

Voiced by: Kaoru Morota

Ophiuca (Ophiuchus in the anime version) is based on the serpent-tamer constellation, Ophiucus. Her form is that of a dark purple snake, she has the power to control snakes. After her defeat, Ophiuca takes on the form of Luna while gathering minus energy to recreate the Andromeda Key. During this time, Ophiuca often bickered with other FM-ians over how to spend money, and she herself also developed a love of shopping. Eventually, Ophiuca is deleted by Gemini Spark in order to fill the Andromeda Key, though her residual wave data existed on Luna, which, with sufficient force, could transform her back into Queen Ophiucus (Ophiucus Queen in the original version and Queen Ophiuca in the English games). In Tribe, Ophiuca reappears alive and appears behind Luna as she attends Sonia Strumm's concert with the other FM-ians. A Noise Change for her is available in Mega Man Star Force 3.

Cepheus

Voiced by: Kazusa Murai

Cepheus (ケフェウス, Kefeusu) is the FM King. His constellation is based on Cepheus. He is the original holder of the Andromeda Key, a device which permits access to a war-engine made up of EM waves throughout the universe known as Andromeda. Under Gemini's suggestion, he obliterated the AM Planet with Andromeda's assistance, and also ordered the assault on the space station from where Kelvin was trying to contact his home world. Cepheus viewed Brother Band as a means for humans to invade and conquer his planet, thus he sought to stop it by declaring war on Earth. He is rescued by Mega Man when Andromeda begins to overload, and turns over a new leaf when offered a hand in friendship. As a token of his appreciation, Cepheus leaves with the Satellite Admins to rebuild the AM Planet from its remnants. He returns in the third game—after it is beaten. Requesting help from Mega Man, he returns to earth due to a black hole attempting to devour the FM and (newly) recreated AM planets.

In the anime, Cepheus does not appear until Gemini Spark is defeated. He reverts Gemini Spark White to his human form and erases his memories from after he met Gemini. While at first seeing the Brother Band as a threat, he turns a new leaf after being exposed to it. He comes to Earth to stop Andromeda from destroying it, apologizing to humans for trying to destroy them when they offered friendship.

Solo and Laplace

Solo Voiced by: Yūki Tai

Solo (ソロ, Soro) is a mysterious character introduced during the events of the second game and anime season as the rival character of the series and Anti-hero of the series. He is the last descendant of the destroyed Mu continent, and is able to EM Wave Change without the aid of a wave being. In his transformed state, he is referred to as Rogue, known as Bly (ブライ, Burai) in the original Japanese version. In the game, he desires to collect the OOPArts in order to find out how Mu was destroyed, and so works with Vega to do so, crossing paths with Geo and Omega-Xis multiple times, thinking they are after Mu and his power. He prefers to work alone, and detests Geo for his devotion to his friends and his positive attitude towards bonds. Solo's abilities to see EM waves and Wave Change resulted in him being branded a monster and being brutalized and beaten by gangs, resulting in him closing his heart off to human contact, symbolized by the EM Wave Barrier he uses in combat. It is also revealed in the third game that Solo appears to be quite fond of video games as suggested when he calls Geo about his deleted saved game data and gets mad at Laplace for doing so.

In the third installment, he's joined by a new type of EM being (called "Wizards") named Laplace. Laplace is presumably an EM Being (UMA) freed from the Remnants of Mu when it was destroyed. Laplace was either drawn to Solo's loneliness, or the fact that he is the last Murian alive. Laplace differs from other EM Beings, being more electromagnetic 'light' than material, making him quite opposite to Acid. Since Solo can already perform Wave Change on his own, he does not Wave Change with Laplace. Rather, Laplace uses his Wizard abilities to transform into a large scimitar that Rogue uses in place of his old broadsword. His goal is to eliminate Dealer, the reason being that they are misusing Murian technology. He somewhat reluctantly joins Geo's side in the struggle against Meteor G, and in the finale deletes Virgo and Corvus when they turn on their hosts and brings Jack and Queen Tia back to Earth. Throughout the game, Solo has saved Geo from a number of dangerous encounters, many of which Geo is oblivious to, though Solo mostly does so as an excuse for saying Geo was in his way. During the post-game content involving Sirius, Rogue shows up outside of the Black Hole Server with the intention of defeating Sirius and reclaiming a stolen piece of Murian metal, but does not intend to do so until after the black hole swallows up Planet FM. Upon being defeated, Rogue says that he and Geo will never see eye to eye, but admits that Geo is strong enough to protect his bonds. Solo has been registered by the Satella Police's Project TC as No. 002, suggesting he attempted wave changing soon after the Hunter VG was installed, and before Geo did. Rogue Noise is a secret Noise Change in Mega Man Star Force 3.

In the anime, Solo is even more of an enigma, as he appears to be working to collect the OOPArts by himself, and rarely speaks. He is shown to be quite powerful in combat, almost effortlessly defeating Geo upon their first encounter, and later again in a three-on-one fight against Geo, Sonia, and Cancer Bubble. However, Geo proved more than a match for Solo when he gained the Berserk Sword. He eventually disappears through a portal to Mu, and is discovered there by Geo and Sonia much later in stasis. He is then revealed to be the protector of the seal on Le Mu, and only pursued the OOPArts so that they could not be used to revive it. Though defeated by Hollow, he reappears to help Geo seal Le Mu back within Mu for once and for all.

Vega

Voiced by: Ai Orikasa

Dr. Vega, known as Doctor Orihime (ドクター・オリヒメ, Dokutā Orihime) in the original Japanese version, is the primary antagonist of the second Star Force game. She was a scientist from the Tanabata Kingdom whose research led to the creation of Matter Waves, materialized EM waves, but she disappeared after discovering Murian ruins. Her designs for Mu revolve around restoring it and using its power to form the Neo Mu Empire. Those who prove exceptional in some way would be allowed to become a citizen of the new Mu. Her plan required the OOPArt in order to unlock Mu from within the Bermuda Maze (the one involved depends on the version being played). To this end, she recruits Solo, the last living Murian, as well as giving UMA (Unidentified Mystery Animal) wave beings to individuals to carry out her bidding. After Le Mu (Ra Mu in the Japanese version) is defeated, it is revealed that her primary reason for reviving Mu is so that she could use its power to bring her dead lover Altair (the only person whom she ever formed a BrotherBand with), back to life. Altair, who sometimes referred to her by the pet name of "Vegalita", had to leave her in order to fight in a war. He died fighting in the war, and as a result, Vega became bitter, and ultimately blamed the world for his death, leading her to become a scientist, and after discovering Mu, she vowed to unleashed her vengeance leading to the events in the game. She had created Hollow as a replacement for her lover, Altair, hoping it would bring him back in a sense, but it had neither his personality or memories, but the image of him kept her from destroying him. Hollow would be her loyal follower, and Vega viewed him as such, until he sacrificed himself for her, making Vega realize that she had loved Hollow as well, not as Altair, but as his own person.

In the anime, she is introduced as a famous researcher who is known for her writings on ancient civilizations as well as the invention of the Radio Composer that Tom Dubius used when he was controlled by Cygnus. She recruited Geo (being able to figure out that he was really Mega Man) into helping her hunt down the OOPArts because she was worried of what would happen should Mu's "Ultimate Lifeform", Le Mu, be awakened. In reality, she wanted to awaken Le Mu and have it rule over the world as its god, eventually revealing this when she had Hollow take the Berserk Sword from Mega Man. In the end, she stayed behind on Mu rather than face imprisonment (as opposed to escaping in the game), leaving her final fate open to interpretation.

The characters of Vega and Altair are based on the central figures of the Japanese Tanabata star festival.

Hollow

Voiced by: Isshin Chiba

Hollow (Empty (エンプティー, Enputī) in the Japanese Version) is Vega's imposing, soft-spoken assistant. His name comes from the fact that he seems almost like an empty shell, with no host. In battle, he attacks by using the four elements and by summoning viruses. Hollow is actually an EM version of Altair (Hiko in the Japanese version), Vega's dead lover. After his death, Vega created a Matter Wave simulacrum of his soul, and placed it inside of a shell body. Hollow, however, had neither the memories nor personality of Altair. Nevertheless, he served Vega faithfully, often acting as a bodyguard, which led to his death when he tried to shield her from Le Mu's power. His final wish was to allow Vega to speak with Altair one last time.

In the anime an electrical generator provides him with limitless power, effectively making him invulnerable. In his initial fight in the anime he easily beat Dark Phantom and Yeti Blizzard, then when he turned on Mega Man under Vega's orders not even Berserk Sword's power (with which Mega Man seemed invincible in all his earlier battles) could stop him. The only downside to this was that his range was greatly limited, and he would be rendered vulnerable if the generator was damaged or destroyed, this likely being the reason Vega had Mega Man collect the OOparts, since Hollow was limited to where the generator was, but when given the OOparts he took from Dark Phantom and Yeti Blizzard he overcame this weakness. Eventually when Geo gained all three OOPArts, Hollow was utterly and epically destroyed by Mega Man's Tribe King form, despite his immense power. Vega does get teary-eyed after witnessing Hollow's destruction, implying that there was a deeper connection between the two.

The characters of Vega and Altair are based on the central figures of the Japanese Tanabata star festival.

Mu EM Body Users

Hyde and Phantom

Hyde Voiced by: Hiroshi Masamoto

Phantom Voiced by: Katsumi Suzuki

Hyde (ハイド, Haido) and Phantom (ファントム, Fantomu) are antagonists introduced during the events of the second game. Hyde can EM Wave Change with the UMA Phantom. In this form, he is referred to as Dark Phantom (Phantom Black (ファントム・ブラック, Fantomu Burakku) in the Japanese Version), and resembles Erik from The Phantom of the Opera. He crosses paths with Geo several times throughout the course of the game, performing tasks such as kidnapping and distributing UMAs, until he is tossed aside by Vega. He makes a reappearance in Mega Man Star Force 3, working on his own. Again, he tries to play things by a 'script', and attempts to steal the Ace/Joker program from Geo in an attempt to control the noise himself and gain more power. After his second defeat, he seemingly falls to his death, but Mega Man was sure that he would return. In the anime, Hyde is a painter, yet his works are not very popular due to their macabre nature, leading him to wish for immortality so that he can live to see the time when his works are recognized. The mischievous UMA Phantom, known as Ghost (ゴースト, Gōsuto) in the anime, appears outside his window one day, encouraging him to search for the OOPArts, saying that they will grant him the immortality he seeks. After tangling with both Mega Man and Yeti Blizzard, he manages to steal the Ninja OOPArt. Vega bribes both him and rival Yeti Blizzard into accompanying her to Mu, yet the two escape when the tables begin to turn in Mega Man's favor. He is currently at large. In the anime, Hyde generally depicted as a comical incompetent fool.

Rich Dotcom and Yeti

Rich Dotcom Voiced by: Masaki Aizawa

Yeti Voiced by: Yuuto Kazama

Rich Dotcom, known as Monjirō Gori (五里 門次郎, Gori Monjirō) in the original Japanese version, and Yeti (イエティ, Ieti) are antagonists introduced during the events of the second game. Rich is a mafia boss and is often seen with a veritable army of female assistants. He can EM Wave Change with the UMA Yeti and become Yeti Blizzard (イエティ・ブリザード, Ieti Burizādo), a wave being that resembles the Abominable Snowman. In the game, he tries to buy the Grizzly Peak resort, and when that fails, he sabotages the mountain's weather system in an attempt to drive its visitors away. In the anime, Rich first appears in an attack on a museum to steal the Sword of Berserk as Yeti Blizzard, but loses his prize to Mega Man. He is not above bribing or threatening people in order to get what he wants, though Yeti often admonishes him for not using his brain enough. The pair eventually do manage to steal the Saurian OOPArt from the Dombler Lake after manipulating Plesio Surf into distracting Mega Man and Lyra Note. Vega bribes both him and rival Dark Phantom into accompanying her to Mu, yet the two escape when the tables begin to turn in Mega Man's favor. He is currently at large.

Gerry Romero and Plesio

Gerry Romero Voiced by: Koichi Toochika

Brachio Voiced by: Kinryu Arimoto

Gerry Romero and Plesio, known as Kyū Demegawa and Brachio in the original Japanese version, are two characters introduced during the events of the second game. Romero is the director and host of "World Mysteries", a Netopian television station and greedily accepts the Plesiosaurus UMA Plesio from Hyde. His wave form is called Brachio Wave in the Japanese version (there is an inconsistency in his English name; see below paragraph). He poses as a monster living in Loch Mess (Dombler Lake in the Japanese version), nicknamed Messie (Dossy in Japan; both names are a play on the Loch Ness monster who is often nicknamed "Nessie"). He does this to boost his station's ratings, but Mega Man puts an end to his deception. In the U.S. release, there is a localization inconsistency regarding the name of Kyū/Gerry's wave form. In the dialog, when he first appears in EM Wave form, he refers to himself as "Plesio Wave", but the actual boss is identified during the battle as Plesio "Surf" (in its usual CamelCase abbreviated form), which is also reflected in the relevant battle cards for the character (later dialog uses the "Plesio Surf" name). In the anime, Romero is head of CMM's Mystery Investigators, sent to investigate reported Messie sightings at Loch Mess. The skeptical reporter is taken over by Plesio, the real Messie, so that he can put an end to development on the lake's shores. Plesio reveals to Sonia and Geo that his attacks are not malicious; he merely wants the lake to be peaceful again. After Rich Dotcom manages to steal the Saurian OOPArt from the lake bottom, Plesio bids farewell to the two, content that the activity will die down. Romero, now convinced of Messie's existence, departs with his crew to investigate other mysteries around the world. In the anime, Romero does not seem to be evil, unlike in the game.

Chief Osa Agame and Condor

Chief Osa Agame Voiced by: Katsuhisa Houki

Condor Voiced by: Takeharu Oonishi

Nansuka Village Chief Osa Agame (referred to as simply the "Shaman" in the U.S. release) and Condor are two characters introduced during the events of the second game. Chief Osa Agame is the leader of Nansuka Village (pronounced "Nan-ska", a reference to the Nazca Lines, and a shortening of the Japanese "nani desu ka," meaning "what is it,"), in which the people greet each other by saying "Nansuka". In the U.S. release, both the greeting and the location are renamed "Whazzap", obscuring references to the aforementioned Nazca Lines (including a section of the village named the "Nansuka Lines"; this was renamed the "Whazzap Lines") but retaining the dynamics of the "Nanska!" greeting used by the natives ("What is it?" can be loosely translated as "What's going on?" or "What's up?"). Additionally, "Whazzap" is portrayed as a country as opposed the merely being a tribal village originally. Agame accepts Condor from Hyde, believing him to be some kind of deity. His wave form, called Terra Condor (Condor Geograph in the Japanese version), believes Bud Bison is his village's god. He kidnaps Bud, Luna and Zack, but is defeated by Mega Man. In the anime, Agame cares deeply about his village and admires its flowers most of all. However, during a ceremony he is possessed by Condor. As Terra Condor he believes himself to be a god and terrorizes his village. In the end Agame is reminded of his love of flowers, distracting Condor long enough for Mega Man to use the Berserk Sword to land a killing blow and delete the UMA. In the aftermath, he comes to believe that Mega Man is in fact Whazzap's god. His Japanese voice actor is Katsuhisa Houki and Condor's Japanese voice actor is Takeharu Oonishi.

Dealer

Mr. King

Mr. King is the head of Dealer, and the main antagonist of the third installment. He is famous as a genius scientist, and his public persona is that of the head of the King Foundation. In the final battle, he fuses with Meteor G to make the Crimson Dragon

Heartless

Heartless is a member of Dealer, and she functions as Mr. King's right hand lady. Heartless is revealed to be a spy who originally headed the organization that made it possible to send Kelvin into space. Aside from trying to overthrow King, she had also been attempting to make contact with Kelvin who was trapped inside Meteor G. She is also an old friend of Geo's mother. It is also implied that "Heartless" is not her real name as Geo's mother reveals that "Heartless" is one of many names she uses.

Queen Tia and Virgo

Queen Tia is part of an organization called Dealer. The FM-ian Virgo (ヴァルゴ, Varugo), along with Corvus, is the most wanted criminal on Planet FM. The two can perform Wave Change to form Queen Virgo (クイーンヴァルゴ, Kuīn Varugo), who is capable of using aquatic attacks such as summoning a dragon made of water. She enters the story by posing as a new teacher at Echo Elementary. It's later revealed that she used to have a relationship with A.C. Eos while he was a member of Dealer. She and her brother were both orphaned in a war sparked over technological advances. As a consequence, the two wish to use Meteor G to destroy the world's technology. Within the Meteor Server, Geo is able to talk them out of revenge, prompting their FM-ian partners to turn on their hosts, but they are deleted by Rogue and the siblings are saved. Queen Tia is later seen by the hospitalized A.C.'s side thus getting back with him. A Noise Change is available with Virgo.

Jack and Corvus

Jack (ジャック, Jakku) is the younger brother of Queen Tia who also works for Dealer. The FM-ian Corvus is, along with Virgo, the most wanted criminal on Planet FM. He also has something of an axe to grind with Omega-Xis. The two can perform Wave Change to form Jack Corvus, a fire-elemental being who can attack from the skies. He enters the story as a new transfer student at Echo Elementary, filling up Pat Sprigs's empty seat in 5-A. He is mostly emotionless around others, his sister being the only one he can open up to, though he does show a highly aggressive side as well. He and his sister were both orphaned in a war sparked over technological advances. As a consequence, he and his sister wish to use Meteor G's power to destroy the world's technology. Within the Meteor Server, Geo is able to talk them out of revenge, prompting their FM-ian partners to turn on their hosts, but they are deleted by Rogue and the siblings are saved. Jack is later seen celebrating the destruction of Meteor G with his classmates, having finally been able to open up to people. A Noise Change is available with Corvus.

Joker

Joker is another member of Dealer. He is able to Wave Change to form Dread Joker, a powerful EM being who fights with brute strength. Joker is not actually a human being, but rather Mr. King's wizard, the self-proclaimed "most powerful Battle Wizard ever created". He draws upon Meteor G itself to achieve his finalized form.