Season 1

Hiro Ryūgasaki is an ordinary middle school student at Tensei Academy. Through a strange occurrence, Hiiro obtains a mysterious smartphone with the popular digital card game Shadowverse app installed. Through the game, Hiro meets rivals, meets new friends, participates in tournaments, and forms bonds with others. Later, Hiro and his friends discover that the true purpose of Shadowverse is to save the world from an impending doomsday event.

Season 2: Shadowverse Flame

Set three years after the events of the first season. Light Tenryu enrolls at Shadowverse College after receiving an invite and pre-loaded deck from the school's founder, Wolfram Zerga. Light has no idea how to even play Shadowverse at first but is told the college is the key to his destiny. He soon joins a soon to be disbanded club called "Seventh Flame." Meanwhile, the newly reformed Genesis Corp has started research into a new artifact called the Arc that has been mysteriously stolen.

Season 1

Hiro Ryugasaki (竜ヶ崎ヒイロ)

Voiced by: Gakuto Kajiwara

Hiro is a 2nd-year middle school student at Tensei Academy. He is extremely perseverant and has a strong genuine love for the game. He lives with his grandfather and had long believed that his parents died during an accident while he was young, however it was later revealed his parents are trapped inside the Tree of Woe, an invention developed by his father's company that backfired and was destined to destroy the world. He plays the Dragoncraft class. He returns in the second season as a member of the Seven Shadows, the top Shadowverse players in the world who hold a secret behind Light's Digifriend Draconir. He has also come to use the Portalcraft class.

Luca Yonazuki (夜那月ルシア)

Voiced by: Junya Enoki

Luca is a middle school student at a different school than Hiro's. At a young age, a truck killed his parents and badly injured his sister, Shiori, who lives in a rehabilitation hospital. Luca plays Shadowverse with the goal to raise enough money for Shiori to recover. He is rarely happy due to Shiori's condition, much to Shiori's chagrin who just wants to see her older brother smile. He plays the Bloodcraft class. He returns in the second season as a member of the Seven Shadows, the top Shadowverse players in the world who hold a secret behind Light's Digifriend Draconir.

Mimori Amamiya (天宮ミモリ)

Voiced by: Kaede Hondo

Mimori is Hiro's classmate and one of his best friends. She worries a lot about being too ordinary. She also is not a fan of ghosts and other scary things. She plays the Forestcraft class. She returns in the second season having continued her education and became a high schooler.

Kazuki Shindo (進藤カズキ)

Voiced by: Hayato Taya

Kazuki is Hiro's classmate and one of his best friends. He is great at sports, but still has room for improvement when it comes to Shadowverse. Due to having to take care of his six younger brothers and sisters, he is surprisingly responsible. He plays the Swordcraft class. He returns in the second season having become close friends with Kai and now runs his family's restaurant.

Kai Ijuin (伊集院カイ)

Voiced by: Atsumi Tanezaki

Kai is a 1st-year middle school student at Tensei Academy. He became part of Hiro's group of friends after hearing about him beating the school bully Takuma and challenging him to a Shadowverse duel. He is extremely analytical and proclaims himself as a "genius among geniuses". He plays the Runecraft class. He returns in the second season having become close friends to Kazuki.

Alice Kurobane (黒羽アリス)

Voiced by: Yui Ogura

Alice is a child idol with millions of fans. She enjoys Shadowverse but it gives her mixed feelings as her managers force her to play "cute" cards which prevent her from playing and enjoying Shadowverse to her full potential. She became part of Hiro's group of friends when bumping into Mimori at a mall and challenging her to a game of Shadowverse. She plays the Shadowcraft class. She returns in the second season showing she has continued her idol career and gives advice to Light.

Mauro Abelard (マウラ・アベラルド)

Voiced by: Yūichi Iguchi

Mauro is a teenager whom Hiro first met at the semi-finals of the National Shadowverse Tournament, but appeared to mysteriously already know Hiro and his father. He takes great thrill in slowly chasing his opponents and backing them into a corner. Later it's revealed he was alone and homeless as a child, so Leon adopted him, with the sole purpose of developing Mauro's Shadowverse skills so he can eventually sacrifice his life to save the world from the Tree of Woe. He plays the Havencraft class. He returns in the second season working for the Genesis Corporation to help them keep their ARC project and the events of the first season a secret.

Leon Aurenche (レオン・オーランシュ)

Voiced by: Toshiyuki Morikawa

Leon is the CEO of Genesis Corp, the creator of Shadowverse. Originally his company was inventing the Tree of Blessings which was designed to bring good fortune to the world, only for it to backfire and become the Tree of Woe which will eventually destroy the world. Leon then invented the Shadowverse game with the purpose of shutting down the Tree of Woe and saving the world. Formerly plays the Havencraft class, he currently plays the Portalcraft class.

Marguerite Valois (マルグリット・ヴァロワ)

Voiced by: Satomi Akesaka

Marguerite is Leon's secretary who sometimes accuses Leon of being impulsive. She has become the new CEO of Genesis Corp in the second season after the events of the first season.

Season 2

Light Tenryu

Voiced by: Yūto Uemura

A brand new student at Shadowverse College. He has never played Shadowverse before the start of the season. He's bad with machines and bad at lying. He's very good though at keeping his promises. His Digifriend is the mysterious Draconir. He plays using the Dragoncraft class.

Draconir

Light's Digifriend that has the unusual ability to actually talk. He has lost his memories of an alleged life before his time with Light that may have something to do with the mysterious Arc artifact. Light is lead to believe that the Seven Shadows hold pieces of Draconir's missing memory.

Itsuki Mitsutagawa

President of the Seventh Flame club. He prefers cute and flowery things which alienated him from other kids growing up. His Digifriend is Slade. He plays using the Forestcraft class.

Subaru Makabe

Light's first friend at Shadowverse College. He prefers to be laid back and not take things seriously. He actually resents Shadowverse because of the pressure from his family to become a pro at it but becomes more serious and confident after joining Seventh Flame. His Digifriend is Baccherus. He plays using the Shadowcraft class.

Shion Otosaka

A solitary and reclusive person. She's incredibly smart but has a hard time connecting with others. This leads to her only interacting with others via her digital avatar, Lady & Gentleman. Originally the secret president of the Sixth Magic club, she joined Seventh Flame after losing to Light. Her Digifriend is Milady and she plays using the Runecraft class.

Ren Kazamatsuri

She's a very athletic and ditzy person with a love of heroes. This alienates her from others around her due to her not being girly enough. She was originally from the Fifth Sword club but joined Seventh Flame in hopes of getting to be who she truly is. Her Digifriend is Amyroth and she plays using the Swordcraft class.

Tsubasa Takanashi

Former president of the Third Feather club. She initially lost interest in Shadowverse after her best friend quit the game after repeated harassment from Haruma Hazeura. She has since become more confident and assertive after joining Seventh Flame. Her Digifriend is Wingy and she plays using the Havencraft class.

Ryoga Jasei

Former student & president of Shadoba Collage's Second Blood. The only things he cares about are his love of metal music and crushing people in Shadowverse. He considers everything else as unnecessary noise. His Digifriend is Demonium but rejects him and he plays using the Bloodcraft class.

Haruma Hazeura

President of the First Reaper club. An enemy of Light, who intends to destroy Seventh Flame. He became cold hearted and focused on crushing anyone he considers weak after repeated losses to Mikado. He plays using the Shadowcraft class.

Mikado Shirogane

Board chairman of Shadowverse Battle College. His Digifriend is Garuel. He initially looks childish and just wants to have fun. In reality he's cold-hearted and views everyone around him as boring toys for him to break. He plays using only Neutral cards (ones not tied to any of the seven classes).