Ultra Agents

• Agent Curtis Bolt: He is the inventor of the Ultra Agents.
• Agent Caila Phoenix: She is a martial artist and a demolitions expert.^[5]
• Agent Jack Fury: He is the thrill-seeking often reckless daredevil.
• Agent Max Burns: He is the Rookie Agent and the professional driver of the Ultra Agents. Later, he is promoted to an Elite Agent.^[5]
• Agent Solomon Blaze: He is the former member of the Galaxy Squad.^[5]
• Agent Trey Swift: Professor Brainstein's Scooter.
• Agent Steve Zeal: He is a member of the Ultra Agents.
• Astor City Guard: The law enforcement of the Astor City.
• Astor City Scientist: The Scientist of the Astor City Lab.
• Professor Christina Hydron: The Scientist of the Ultra Agents.
• Professor Brainstein: He is a member of the Astor City Research team and Agent Curtis Bolt's mentor. Later, he became a villain with a 4-legged mech suit.
• P.U.P.(Prototype Unmanned Patrol): The robotic dog.

Villains

• Adam Acid: He is a former harbor master who became Toxikita's henchman.
• AntiMatter: His real name is Morgan Lux, is a former Ultra Agent and main antagonist of the Lego Ultra Agents series. An accident involving a crime-fighting tool transformed him into the evil AntiMatter, a compound of a thousand criminals. Seeking to take over Astor City, he invented a staff that allows him to open portals that "reverse the polarity" of a person, transforming them into their evil clone.
• Infearno: He is a former firefighter who became a villain with a flamethrower and a flaming hoverboard.
• Psyclone: He is a former weathercaster who became a villain with giant silver propellers on his back.
• Retox: Toxikita's henchman.^[5]
• Terabyte: He is a former IT specialist who became a computer hacker and his plan is to hack Astor City's computer systems.^[5]
• Toxikita: She is a former environmentalist who became a villainess and her plan is to spill toxic waste into the ocean.^{[lower-alpha 1][6]}
• Tremor: His real name is Louis Lightweight. Tremor is a villain with heavy armor and flat fists.^[5]
• Spyclops: He is a former exterminator who became a villain with robotic spider arms and portable venom spray.^[7]
• Invizable: He is a former rock star who became the invisible man.^{[lower-alpha 2]}
• Drillex: He is a former construction safety supervisor who became a villain with armor with twin drill hands.
• SharX: AntiMatter's personal bodyguard.
• Electrolyzer: He is a former electrician who became a villain with dual electron rods and the ability to produce electricity.

First wave

The first wave of Lego Ultra Agents sets was released on 27 May 2014. Most of the sets were similar to the Lego Agents theme, but the Lego Ultra Agents theme depicted fictional Ultra Agents fighting evil villains accompanied by high-tech equipment in the area of Astor City, which was accompanied by an accessible app.^[2][9] The six sets^{[10][4][11][2]} being released were Riverside Raid (set number: 70160),^[12] Tremor Track Infiltration (set number: 70161),^[12][13] Infearno Interception (set number: 70162),^[12][13] Toxikita's Toxic Meltdown (set number: 70163),^[12][13][14] Hurricane Heist (set number: 70164)^[12][13] and Ultra Agents Mission HQ (set number: 70165).^{[12][15][16][13][17]} Each of the sets included eight Ultra Agents, named Agent Max Burns, Agent Jack Fury, Agent Solomon Blaze, Agent Curtis Bolt, Agent Caila Phoenix, Professor Christina Hydron, Astor City Guard and Astor City Scientist.^[5] Several villains were released, named Adam Acid, Tremor, Infearno, Toxikita, Retox, Psyclone, and Terabyte.^[5] It also included variety of weapons and accessories.

Second wave

The second wave of the Lego Ultra Agents theme was released on 1 March 2015 and had five sets (total of 11 sets) with similar models to the first wave. The second wave also incorporated a sequel to the first compatible app that focused on a villain named Antimatter.^[9][18] The eight sets^[19][20] being released were Spyclops Infiltration (set number: 70166),^[21][22] Invizable Gold Getaway (set number: 70167),^[21][22] Drillex Diamond Job (set number: 70168),^[21][22] Agent Stealth Patrol (set number: 70169)^[21][23] and UltraCopter vs. AntiMatter (set number: 70170).^[21][22] Four additional Ultra Agents, named Agent Trey Swift, Agent Steve Zeal, Professor Brainstein, and P.U.P were released as well. Several additional villains were included, named Spyclops, Invizable, Drillex, and AntiMatter.^[24] It also included AppBricks, variety of weapons and accessories. Allows builders to build the AppBricks by place on the touch-screen of tablet device to unlock game features and find secret clues.^[25]

Third wave

The third and last wave of the Lego Ultra Agents theme was released on 19 May 2015 and had three sets (total of 14 sets) with similar models to the first wave. The three sets being released were Ultrasonic Showdown (set number: 70171),^[26] AntiMatter's Portal Hideout (set number: 70172)^[26][27] and Ultra Agents Ocean HQ (set number: 70173).^[26] Additional villains, named SharX and Electrolyzer, was released as well. It also included AppBricks, a variety of weapons, and accessories. The sets were designed primarily for children aged 7 to 14 years old.