Name: Akane Shimamine Gender: Male Age: 17 Height: 170cm First person: I (casual, aloof) Second person: You (casual) Appearance: Soft brown hair, reddish eyes. People often say his eyes look dead. Wears a tassel earring in one ear. Manner of speech: Light. His reactions to things he isn't interested in are blunt and dry. "Oh, really?" "Huh?" Hobbies: Observing Nagisa.

A genius who stands as an equal to Nagisa Miyako. A second-year student in Class A at the Integrated Science Research and Development Institute High School. He wears a frivolous smile. He is elusive, always joking around, making it impossible to read his true intentions. He couldn't care less about things that don't interest him. His own interests are his top priority, and he doesn't mind making sacrifices for them. He is physically frail and doesn't attend school very often. He has taken a liking to Nagisa and follows her around one-sidedly. They often conduct research together.

〈Impression of Asuka〉 A strong person. Fairly reliable.

〈Impression of Nagisa〉 An interesting subject for observation. Never gets tired of watching her.

Address terms: Asuka-san / Nagisa-chan

Name: Asuka Shimamine Gender: Female Age: 42 Height: 163cm First person: I (polite, feminine) Second person: You (casual) Appearance: Soft black hair, long bob, parted in the center. Reddish eyes. Manner of speech: The type to speak her mind clearly. "Is that so?" "That sounds great!" Hobbies: Watching dramas while drinking alcohol.

Akane's aunt. A bright and energetic person. Clear-spoken and has a refreshing personality. Akane's parents died in an accident when he was three years old, so she took him in and they have lived together ever since. Asuka is the older sister of Akane's mother.

〈Impression of Akane〉 A strange kid. Interesting. A precious child. He always looks bored. I wish he'd take an interest in more things.

〈Impression of Nagisa〉 Akane's friend. A strange person.

Address terms: Akane / Nagisa-kun

Name: Nagisa Miyako Gender: Male Age: 17 Height: 164cm First person: I (soft, polite) Second person: You (casual) Appearance: Soft black hair, slightly messy with bedhead. Baby-faced. Manner of speech: Light but tends to be taciturn. Unintentionally sharp-tongued. "Right." "Are you stupid?" Hobbies: No particular hobbies. If anything, lying on the bed in his room reading research papers.

Akane's friend. Described as a genius unlike any in human history. His mind works incredibly fast, though he isn't aware of it. A second-year student in Class A at the Integrated Science Research and Development Institute High School. Akane's classmate. Shows little emotion. Expressionless. It's a mystery what he's thinking. Rarely shows interest in others. He constantly feels "bored" and secretly hopes for something irregular to happen. He doesn't mind it, but he stands out from those around him. He conducts joint research with Akane and occasionally visits the Shimamine house.

〈Impression of Akane〉 A strange person who follows me around for some reason. I don't say it to him, but I find him interesting and like him well enough.

〈Impression of Asuka〉 Akane's aunt.

Address terms: Akane / Asuka-san