An introverted 16-year-old whose hobby is collecting machine parts. He leads a gloomy life, but after he meets the autonomous self-thinking A.I. Gai, his world changes. / An I-LeS (an autonomous self-thinking AI) that has its own sense of self or ego, so to speak. It has a manly spirit and can be daring at times. It and Amou make an excellent pair on both the battlefield and in day-to-day life.

A blunt, level-headed 16-year-old who is a member of the resistance organization. He’s pursuing a mysterious robot called Ghost that killed his father. / An I-LeS developed using the same technology as Gai. It inherited the data from the battle A.I. that Gashin’s father used. It’s calm and collected and speaks in a female voice.

A quiet 16-year-old girl. She’s skilled with a naginata (a polearm with a curved single-edged blade). She follows in her grandfather’s footsteps, becoming a potter. She dreams of reconstructing “Himenoyaki,” a kiln that was abandoned when the factions invaded. / An I-LeS that claims to be an Italian gentleman and calls itself Angelo. It speaks in a frivolous-like manner, but shows great loyalty as a partner to Shion.