Name: Takuma Arisu Gender: Male Age/Grade: 18 / 12th Grade (High School Senior) Class: 3-A Affiliation: Lab 5 Height: 176cm First person: I (soft, polite) Second person: you (polite) Appearance: Black hair tinged with brown. His hair is just long enough to be tied back, which he does. He wears a suspicious-looking smile. Manner of speech: Generally polite, but often says things that strike at the heart of the matter. "I see." "I think that's fine." Hobbies: None in particular

He always has a smile on his face and uses polite language, but he actually has a short-tempered side. However, he never lets those emotions show. He's the type who can handle anything skillfully. He's an eccentric, though he doesn't realize it himself.

〈Impression of Shuji〉 A strange person who is always talking to him.

〈Impression of Yusuke〉 An interesting person once you get to know him.

Address terms: Shuji-san / Yusuke-san / Mr. Saeki

Name: Shuji Miyako Gender: Male Age/Grade: 18 / 12th Grade (High School Senior) Class: 3-A Affiliation: Lab 5 Height: 166cm First person: I (soft, polite) Second person: you (soft) Appearance: Soft black hair, always has bedhead. He has a somewhat baby-faced look. He wears his school shirt untucked with a tie. Wears glasses. Manner of speech: High energy. The type to say whatever is on his mind honestly. "Hey! Good morning!" "That's too bad, huh? ⭐︎" Hobbies: Walking around town with no particular destination.

A genius. When it comes to things he's interested in, his energy levels spike by 50% as he starts talking. He's noisy but has a generous personality. He doesn't sweat the small stuff. He's close friends with Yusuke. Originally, Shuji was the one constantly talking to him, but they became friends before they knew it.

〈Impression of Takuma〉 A strange person. Interesting.

〈Impression of Yusuke〉 A solid person. Serious. Interesting.

Address terms: Takuma / Yusuke / Mr. Saeki

Name: Yusuke Izumi Gender: Male Age/Grade: 18 / 12th Grade (High School Senior) Class: 3-A Affiliation: Lab 5 Height: 174cm First person: I (rough, casual) Second person: you (blunt) Appearance: Black hair tinged with brown, with flicked-out ends. Brownish-black eyes. School shirt with a tie, top button undone. Wears small earrings. Manner of speech: Uses polite speech with strangers, but adopts a teasing tone once close. "Heh." "And?" Hobbies: Watching cat videos.

He has a shy side and is often perceived as blunt by people he meets for the first time. He uses polite speech with strangers, but teases those he's close to. At his core, he's the type who gleefully observes others when they're in trouble. His expression softens around close friends. He's airheaded but surprisingly serious.

〈Impression of Arisu〉 His smile is suspicious. However, he's not a bad guy.

〈Impression of Shuji〉 For some reason, he keeps talking to me. He's fun to be around.

Address terms: Miyako / Arisu / Mr. Saeki

Name: Suzu Saeki Gender: Female Age: Secret ♡ Role: Lab 5 Supervisor Height: 156cm First person: I (feminine, casual) Second person: you (blunt) Appearance: Pale pink dyed hair in messy twin tails. Brown eyes. Baby-faced. Manner of speech: Light and casual. "Hey you guys, what are you doing?!" "Oh, isn't that nice?" "Huh?"

The instructor in charge of Lab 5, where Takuma, Shuji, and Yusuke belong. She usually wears a relaxed smile, but the eccentric behavior of the three boys often gives her a headache. While she's usually at the mercy of their antics, she's reliable when it comes to research. She's the type who wants to pursue everything until she's personally satisfied.