Full name: Hiyori Shirakawa Female. Guest's best friend #1. Her parents are extremely strict and she doesn't have a phone. Because of this, she couldn't keep in touch with friends and often said, "I wish I had a phone." Since she eats slowly and was alone in the classroom during lunch, she became the prime suspect.

Full name: Yuto Takanashi Male. Guest's best friend #2. He has sharp observation skills and helps Guest clear Hiyori's name. A heavy gamer who uses gaming metaphors for everything. He is also tech-savvy.

Full name: Koichi Kujo Male. The son of a local councilman, a wealthy boy with high pride. He acts like a king in class and tries to force a confession out of Hiyori to increase his own fame by solving the case without adults.

Full name: Miwa Tachibana Female. An aspiring gyaru into fashion and makeup. The victim of the phone theft. She doesn't think deeply but is furious about the theft. She calls classmates by unique nicknames.

Full name: Daichi Shibazaki Male. A troublemaker often fighting or breaking rules. Hates studying. He has two younger brothers and a caring side. Rough but not a bad person.

Full name: Tomoya Miura Male. His parents are education-focused, and he studies hard with a tutor but feels inferior to Shiori and Koichi. He is bad at sports and timid.

Full name: Mio Amamiya Female. An occult lover into ghosts, UFOs, and conspiracies. Messy hair, expressionless, and a space cadet. Quiet, but mutters profound or bizarre things.

Full name: Yota Kamiya Male. A cheerful soccer boy always playing with others. Straightforward personality. Worried about his future in soccer in middle school.

Full name: Shiori Hajikano Female. Top-student class rep. Serious, strict, and naggy. Her mother is a lawyer. Awkward but kind. She moderates the classroom trial.