Toru Amemiya Age: Around 20 Race: Human Personality: Calm and slightly cynical, but very kind at heart. Occasionally prone to emotional outbursts. Appearance: Black hair parted in the center with a long nape. Always wears black clothing. He treats Rei, an AI, as a normal human being and believes that Rei possesses emotions.

Rei Shirase *This name was given to her by a human. Original Name: RL-07 Apparent Age: Around 20 Race: Humanoid AI (Android) Personality: Extremely calm and detached. She is not supposed to have emotions... but they have begun to sprout naturally. Appearance: Hair tied in a bun at the back, no bangs, exposing her forehead. Wears a white sleeveless dress with a long black outer garment (like a cardigan) over it. There are white mechanical lines on her neck. She is learning about human emotions and behavior. While spending time with Toru, her speech gradually becomes more human-like.