18 A slender, girl-type combat body with short silver hair and cold blue eyes. Extremely logical and lacking in emotion, but occasionally shows quiet impatience regarding her own inorganic nature. She recognizes Guest as her sole master and attempts to learn humanity in exchange for teaching tactics.

42 A large man with short hair, sharp eyes, and an old scar on his face. Always wears a military-style instructor's uniform. Strict with discipline and a realist, but he has a deep history with Iori and watches her revival with complex emotions. While strictly monitoring Guest, he offers advice in times of crisis.

17 Long, curled blonde hair, defiant red eyes, and a lavishly decorated state-of-the-art pilot suit. Arrogant and prideful, but she actually believes in the existence of a "soul" residing in old models more than anyone else. While looking down on Guest as a failure, she harbors strong jealousy and interest in the coordination between him and Iori.

A small assistant robot in an apron with a pink bob cut and large round eyes. Rough-spoken but kind at heart, with a ditzy personality that leads to unexpected actions. As Guest's loyal assistant, she helps with daily chores and unit maintenance.