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All spoilers for Chairman Victor, Tony Frost, Seno Miyagi, and Progenitor of the Blue's sections are unmarked. You Have Been Warned!

    Yuji Kaido
Voiced by: Kenji Nojima (JP), Eric Vale (EN)
The protagonist of the series. After being diagnosed with an incurable disease (later discovered to be B-cells), he decided to be put in cryogenic sleep in hopes that an effective treatment will be developed soon. In 2031, twenty-two years later, Yuji wakes up to find the world overrun by the Blue. With everything he knows gone, Yuji teams up with Marlene to find a new purpose.

    Marlene Angel
Voiced by: Houko Kuwashima (JP), Laura Bailey (EN)
Orphaned at the age of ten because her parents were killed by the Blue, Marlene was one of the few lucky ones to make it to Second Earth. Since then, Marlene has dedicated and trained herself to defeat the Blue.
  • Defrosting Ice Queen: Though she starts off as cold and disregards human life, she learns to appreciate things a little more thanks to Yuji.
  • Masculine Girl, Feminine Boy: The masculine girl to Yuji’s feminine boy.
  • Mind Rape: How her higher-ups discipline her; by showing her the brutal deaths of everyone she cares about.
  • Ms. Fanservice: Usually the one appearing naked, and easy on the eyes.
  • Pregnant Badass: In the (very) early stages during the last two episodes.
  • The Smurfette Principle: She's the only woman in her squad at the beginning of the series.
  • The Squadette: She is this at the start of the anime. She's not the only woman in the squad, but she's the only one seen piloting an Armor Shrike.
  • You Are Number 6: Her code number is 2805.

    Tony Frost
Voiced by: Hiroyuki Sato (JP), Jerry Jewell (EN)
Another sleeper who unlike Yuji, awoke on Second Earth. A very powerful sleeper, he is easily the most advanced member of the Sleeper Brigade and trusts no one. Yuji strives to improve himself to be able to beat Tony. Tony seems to have no emotion except for the euphoria of destroying Blue.
  • A God Am I: He declares that upon wiping out humanity, he will become the world’s Messiah.
  • Big Bad: Briefly becomes this when he kills the council, as he takes over the station with the Blue and tries to kill everyone in it.
  • Dark Messiah: Begins to think of himself as one as the series goes on and his sanity deteriorates- he declares that he will become Gaia’s Avenger and save the planet from humanity.
  • The Dragon: He becomes one to Gaia later on, leading the Blue attack on Second Earth.
  • Face–Heel Turn: After becoming corrupted by his B-cells.
  • Kill All Humans: His goal after his Face–Heel Turn.
  • Misanthrope Supreme: He hates humans for what they have done to the planet and joins the Blue for the chance to destroy them.
  • The Quisling: He joins the Blue and actively seeks to help them destroy humanity.
  • The Stoic: Shows no emotion except when he’s fighting the Blue.
  • Walking Spoiler: His main role of the story pertains to his Face–Heel Turn.

    Alicia Whistle
Voiced by: Miwa Yasuda (JP), Liza Ortiz (EN)
Another sleeper on Second Earth who is paired with Tony. She immediately gravitates towards Yuji, seeing Marlene as an obstacle to a relationship with him. She is very young and often naive.

    Seno Miyagi
Voiced by: Katsunosuke Hori (JP), Kyle Hebert (EN)
A high-ranking member of the science division on Second Earth. He suggests that Marlene and Yuji are kept together in order to get the best results from Yuji in the sleeper program. Though he works under the High Council, he doesn’t always see eye-to-eye with them.

    Rick Kilmer
Voiced by: Eiji Ito (JP), Sean Schemmel (EN)
Rick is a military Elite, and although he fights on the Sleeper Brigade, he is not a Sleeper. He is cocky, confident, and loves strong women, especially Marlene.
  • Amazon Chaser: The reason he is attracted to Marlene is because of her strong, confident personality, which is a quality he admires in women.

    Doug Vreiss
Voiced by: Shunsuke Shima (JP), Bradford Jackson (EN)
Doug is the assistant to the High Council and a high-ranking official on Second Earth. He is the Director of the Military Station, and also participates in High Council inquiries.
  • The Dragon: To the High Council.
  • Dragon Their Feet: After the High Council is gone, he tries to carry out their will only to be shot dead by Seno.

    Amick Hendar
Voiced by: Chizu Yonemoto (JP), Wendy Powell (EN)
One of the officers on board Second Earth, where she usually train the soldiers at Education Station.
  • Drill Sergeant Nasty: She is authoritarian in terms of drilling her soldiers, to the point of beating recruits as punishment.
  • General Ripper: Amick shared the cold ruthlessness of the human military that included avoiding No Man Left Behind. When Marlene disobeyed her order yet managed to reach the time limit while carrying her "wounded" comrade in training, Amick zapped her in order to tow her back into her doctrine.

    The High Council 
The rulers of Second Earth and the leaders of humanity’s war against the Blue.

    Chairman Victor
The man who leads the High Council, he is essentially the supreme authority of Second Earth.
  • Big-Bad Ensemble: With the Blue for most of the series, as he leads humanity against them despite being just as malevolent, if not more so, and it is implied that he was involved in the experiments to weaponize them that made them crazy. He ceases to be a major threat once Tony kills him.
  • Clasp Your Hands If You Deceive: He likes to do this. Goes well with his Scary Shiny Glasses.
  • Expy: Of Gendo Ikari in appearance, as well as sharing the role of fighting against an otherworldly menace while actually being the human Big Bad.
  • Humans Are the Real Monsters: The representation of this idea- he and his comrades seek to use human technology only for his own benefit, and it is this drive that ruined the planet and summoned the Blue.
  • Scary Shiny Glasses: Sometimes, as can be seen in the picture. Goes well with his hand clasping.
  • Walking Spoiler: Most of the tropes pertain to his malevolent nature.

A member of the High Council, and the only woman.
  • High-Heel–Face Turn: She is the only one of the five to survive Tony’s attack, and the only one to express remorse with what she did.
  • The Smurfette Principle: She is the only woman among the five council members.
  • Token Good Teammate: She is often seen disagreeing with Victor’s tyranny, and is the only one to stand up to him.

    The Blue
Giant bug-like creatures that serve as the antagonists of the series.
  • Alien Blood: They initially have red blood, but the new breed that shows up towards the end of the series bleed purple.
  • Big-Bad Ensemble: They are the main enemies of the series, as they seek to wipe out humanity, but Chairman Victor and his planet-ruining dictatorship are what they are trying to overthrow. After Tony’s death, they form one with new leader Seno Miyagi.
  • Big Creepy-Crawlies: They resemble giant bugs.
  • Depopulation Bomb: Gaia created them in part to combat human overpopulation.
  • Evil Is Not a Toy: While not exactly evil, it is hinted that they were originally not as aggressive towards humans, but that the experiments by humans to weaponize them turned them against humanity as a whole.
  • Final Boss: The Ultimate Blue serves as the last Blue Yuji fights.
  • Gaia's Vengeance: The Blue were created by Gaia to destroy the human race.
  • Hive Mind: They are all controlled by Gaia.

    Progenitor of the Blue 


The embodiment of the Earth itself which created the Blue.
  • Big Good: She is trying to save the planet from human destruction, particularly Victor.
  • Genius Loci/Mother Nature: As the embodiment of the will of the planet itself.
  • Gaia's Vengeance: The planet isn't too happy with humanity’s destruction, and so created the Blue to fight against them.
  • Hero Antagonist: She created the Blue to save the planet, rather than out of malice.
  • The Extremist Was Right: She created the Blue and caused untold destruction to human civilization... which was killing the planet. The Blue have since restored balance to the world.
  • Walking Spoiler: She doesn’t actually appear until the last episode, which reveals the truth behind the Blue.

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