Yuuki Yamato
Also known as Imperial All-Terrain Strike Support Ranger, Codename: Stryker Zero. Straightforward to the point of single-mindedness, he will do whatever it takes to save people, even in his civilian identity. When the Balbora Empire’s invasion force appears, Yuuki moves to the city to oppose them. He passes his days as an ordinary student while hiding his secret identity.
Hongo Haruna
Yamato’s childhood friend. When Yamato transfers to her class, she is delighted to see him again, but is shocked by how much he has changed. She has a cheerful, domestic personality.
Ichimonji Sayaka
Another girl in Yamato’s class, stubborn but resourceful. She works as a waitress at Cafe Ichimonji, where Yamato often spends his evenings, but is constantly irritated that he never orders more than a single cup of coffee.
Jack
A self-taught student of ninjutsu from Texas, Jack moved to Japan to ”become a true ninja.” Because an old ninja manual said that ninjas don’t use their real names, ”Jack” is merely a pseudonym.
Kazami Rin
A Balboran spy, sent to infiltrate Japanese society. Rin is not a cyborg and has no fighting ability. Her rank is Corporal. She disguises herself as a student in Yamato’s school to learn more about Stryker Zero.
Colonel Mirror
The commander of the Balboran advance mission to infiltrate Japan. He seems to have his own agenda, though, and parts ways with the invasion force early on to undertake a ”secret mission.”
Captain Murray
A serious woman who leads the vanguard in Mirror’s stead. When not in uniform, she looks like a run-of-the-mill sweet old lady. In her younger years, she was quite popular with the boys.
Captain Daniel
A middle-aged cyborg with a pleasant, gentlemanly demeanor and the power to control gravity. He’s rarely seen without a cigarette on his lips, and runs a food stall to help stave off the vanguard’s money woes.
Lieutenant Roches
A cyborg with the advanced Balboran invasion force. He also goes by the alias ”Silverado Roches,” and fights with a glimmering silver sword.
Lieutenant Phoenix
An easygoing, rough-and-tumble cyborg who controls flame. He goes by the alias ”Hellfire Phoenix.”
Lieutenant Hilko
A highly vain cyborg who thinks much of her own beauty. She uses telekinesis in battle and is a master strategist.
Warrant Officer Orson
A silent giant who hides his face behind a mask. A slow, powerful combatant capable of throwing cars and trashing buildings.
Warrant Officer Duran
A cyborg with a curious accent who specializes in gadgets. He goes by the alias ”Braniac Duran” and seems to have a crush on Hilko.
Warrant Officer Joseph
A dog who whose neural pathways have been modified to allow him to speak. He conducts himself with dignity most of the time, but he can’t entirely hide his animalistic tendencies -- after all, he’s still a dog.
Memory Collector
A mysterious being whom Yamato met at a shrine when he was a boy. He grants wishes in exchange for memories.
Lieutenant Colonel Clie
A cyborg with advanced battle capabilities. With the longsword at her hip and her mechanical arm, she lays waste to her enemies. Her rank is Lieutenant Colonel, but her power is said to match that of the Vanguard’s leader, Colonel Mirror.
