- Achilles in His Tent: In the first season, after Touga attempts to Shoot the Dog and kill Cecile along with the Zeravire of the week.
- Foil: To Touga.
- Get a Hold of Yourself, Man!: Gives one to Touga in Zwei.
- The Lancer: To Touga. If he wasn't, Touga wouldn't have learned restraint in combat to prevent casualties in the first place.
- Master of Disguise: Can disguise as a woman believably enough to get other men to flirt with him, much to his chagrin. He even uses actual prosthetic breasts to help things.
- Red Oni, Blue Oni: Red to Touga's Blue, being more emotional and hotblooded than the more reserved and polite Touga.
- Restraining Bolt: Part of the reason he was brought in as a Grand Knight was because they did such a good job raising Touga to fight at the exclusion of nearly everything else, that Touga didn't know how to avoid casualties and collateral damage when actually fighting, and the other Knights were too into the I Did What I Had to Do mentality to even think of getting him to stop, or just didn't know any better either.
- Supporting Protagonist: He's the protagonist, but Touga's the leader.
- Wholesome Crossdresser: Eiji ends up wearing a dress quite often over the course of the series(at least twice of his own volition), and is always pretty chill about it.
- The Ace: Trained all his life since childhood to pilot the Gran Kaizer and the Gravion. This is NOT a good thing, in spite of how polite and well mannered he is.
- Chaste Hero: Not really by choice, but mostly because he doesn't QUITE get romance yet due to his unusual upbringing.
- Child Soldier: All his life he was raised just to fight the Zeravire. One of the reasons why Eiji was brought into the fold was so he could have contact with another boy his age and help actually socializing in contexts outside of what he's used to in the castle. The other being because Eiji serves as a living Restraining Bolt to keep Touga from losing himself in fighting. Because he's so polite and well mannered, he just seems like a naive but pleasant airhead at first, his deeper issues not actually apparent.
- Deuteragonist: The show's other main character, after Eiji.
- Raised by Wolves: In episode 5 after stepping out of Saint Germain Castle with Eiji to visit the city, he shows just how isolated he has been from contact outside of the castle with how clueless he is regarding society, specially with how he doesn't seem the least bit perturbed by Eiji's method of sneaking out of the castle by dressing in drag AND using prosthetic breasts.
- Genius Ditz: Touga is an extremely skilled mecha pilot and commander... and also a complete airhead.
- Gone Horribly Right: At the beginning, he would focus solely on destroying opposing Zeravire unites and nothing else, not even so much as considering avoiding collateral damage or casualties. He nearly got Cecile, one of the younger maids, and Eiji, who is basically HIS BEST FRIEND, nearly killed during a zeravire attack because he wouldn't hold back on attacking while Eiji rescued Cecile from danger in the middle of a fight. It wasn't out of malice, he just didn't know any better because his training didn't cover anything BUT combat.
- The Hero: As the pilot of the Gran Kaiser, he is this despite not being the actual main protagonist.
- Princely Young Man: In spite of being clueless regarding normal human contact, he's always soft spoken and polite.
- Red Oni, Blue Oni: The Blue to Eiji's Red, being the more disciplined and focused of the two, at least in combat. In social situations, he's more polite and reserved than Eiji, who looks very crass in comparison, but not without warmth.
- Talking to Himself: With Lelouch Lamperouge and Luca Angelloni in Super Robot Wars Z2.
- Genki Girl
- Talking to Herself: With Aoi Hidaka in Super Robot Wars Z2.
- Tsundere: Type A for Eiji, Type B for Touga.
- Back from the Dead
- Heroic Sacrifice: To save Touga, in Zwei.
- Proper Lady: In sharp contrast to her copilot.
- Ridiculously Human Robots
- Super-Powered Robot Meter Maids
- You Gotta Have Blue Hair: Green, and later pink.
- Boobs of Steel: far bustier than the other female grandknights and is the only one with any kind of hand-to-hand combat skills.
- Gag Boobs
- Hard-Drinking Party Girl
- The Mole
- Ms. Fanservice
- Obfuscating Stupidity: Part of her Hard-Drinking Party Girl image is an elaborate act to hide she's very good with computers and an EFA intel officer.
- Unresolved Sexual Tension: Has a hefty amount of this with Eiji, who gets to see her rarely shown serious side, and whom she hits on repeatedly, both in private and in public.
- Pigeonholed Voice Actor: Yuu Asakawa as a Ms. Fanservice with large breasts. Surprising, eh?
- Voiced by: Houko Kuwashima (JP), Allison Keith (EN)
- Heroic B.S.O.D.: After learning that Sandman is her father, and she is an alien.
- Human Aliens
- Mysterious Waif
- You Gotta Have Lavender Hair
Klein Sandman (Zieg Zeravire)
- Ascended Fanboy: Definitely seems like it.
- Cain and Abel: The Abel to Hyugi's Cain, due to marrying the latter's sister.
- Death Seeker
- Heroic B.S.O.D.: In Zwei. Ayaka!Raven snaps him out of it.
- Human Aliens
- I Always Wanted to Say That: He always wanted to introduce the titular mecha in an awesome way; he gets to.
- Ignored Expert
- Immortality: He is at least four hundred years old, but is implied to be much, much older than that. He loses this at the end of the series, though, when he activates the Gran Sigma.
- Large Ham
- Leele I Am Your Father
Raven (Ayaka Shigure)
- Becoming the Mask: Anyone wearing the Raven mask gains access to the memories of past Ravens.
- Bifauxnen: This one, at least.
- Char Clone
- The Comically Serious
- Cool Mask
- Drill Sergeant Nasty: Especially from Eiji's perspective.
- Legacy Character: The present Raven is Eiji's sister Ayaka, the one before was Luna's father; it dates back to Sandman's assistant on his home planet.
- Transferable Memory: His mask.
Faye Lin Xu
- Voiced by: Saeko Chiba (JP), Stephanie Nodolny (EN)
- Voiced by: Kenyuu Horiuchi (JP), George Manley (EN)