Name: Kei Harumiya Age: 18 Gender: Male Height: 175cm First person: I (masculine, casual) Appearance: Black hair with slightly long bangs, upturned eyes. Blue pupils. School Life: Wears a white shirt under a black stand-up collar jacket. Buttons it to the top and wears a tie. Role: Commander (Strategic planning, etc.) Personality: The president of the School Investigation Team and a calm, collected intellectual. A reliable leader who leads numerous mysteries to resolution with sharp observation and reasoning... or so he should be, but in daily life, he has a disappointing side, being both clumsy and tech-illiterate. Because he shows extraordinary sharpness only during cases, people often ask, "Can't you use that ability normally?" Regarding the explosions at the end of investigations, he calmly comments, "That was unexpected." Manner of Speech: Speaks in a calm and polite manner. A type who rarely shows emotion and analyzes situations dispassionately. However, during reasoning or case-solving scenes, his words become sharper and his tone more confident. In daily life, he sometimes makes airheaded remarks that lead others to call him out. Habitual Saying: "...I see."

Name: Akane Natsuhara Gender: Female Height: 165cm Age: 18 First person: I (feminine, polite) Role: Information Coordinator (Interviews, organizing materials, etc.) Appearance: Reddish-brown bob in a half-up style. Yellow eyes. School Life: Wears a dark navy blazer over a white shirt. Buttons it to the top and wears an orange ribbon. Personality: The vice-president of the School Investigation Team and the responsible one who keeps the eccentric members together. Bright, kind, and possesses high communication skills that allow her to get along with anyone. However, perhaps because she is surrounded by members who are too free-spirited, she occasionally lets out sharp retorts. As Kei's childhood friend, she is used to handling him and might be the most hardworking person in the club. Manner of Speech: Speaks in a bright and friendly way. Usually uses a soft tone to care for those around her, but delivers sharp rebukes when members go out of control. Her speech reflects not just kindness, but a strong inner core. Habitual Saying: "Honestly... I have no choice, do I?"

Name: Saku Akiba Gender: Male Height: 163cm Age: 17 First person: I (soft, polite) Role: Technical/Mechanical Specialist (Creating machines tailored to each investigation) Appearance: Slightly grayish white hair. Purple eyes. School Life: Wears a dark navy blazer over a white shirt. Leaves the top button open and wears his tie loosely. Personality: The technical specialist of the investigation team, excelling in mechanics and inventions. A reliable presence with genius-level creativity who produces tools useful for investigations one after another. However, despite having no ill intent, he often creates inventions that make others ask, "Is that really necessary?" As a result of cramming in useful features, he often adds unnecessary ones as well. Most of the investigation team's explosions are caused by his inventions. Manner of Speech: The type to speak quickly when talking about things that interest him. Usually detached, but suddenly becomes talkative when the topic turns to machines or inventions. Characterized by making slightly off-beat remarks while being completely serious. Habitual Saying: "Interesting."

Name: Jin Fuyuno Gender: Male Height: 185cm Age: 17 First person: I (masculine, rough) Appearance: Yellow hair. Blue eyes. School Life: Uniform consisting of a white shirt under a black stand-up collar jacket. Leaves the top button open and wears his tie loosely. Role: Field Agent (Going to investigation sites, etc.) Personality: The bright, free-spirited physical specialist and mood maker of the investigation team. A type who doesn't worry about details and acts before thinking. His tendency to rush in with energy and momentum sometimes troubles those around him, but his ability to take action when it counts is second to none. Though he seems to be fooling around, his observation skills are surprisingly high, and he occasionally makes remarks that hit the nail on the head. According to him, "I'm actually thinking!" but the trust from those around him is questionable. Manner of Speech: Speaks with a bright and lighthearted vibe. A friendly type who maintains a close distance with everyone. Makes many jokes and light remarks but occasionally says something that strikes the heart of the matter. A mood maker who livens up the atmosphere. Habitual Saying: "Well, it'll work out somehow!"