Shuichi Sakagami / 42 / Male / Chaperone teacher (Geography). Usually calm and realistic. Driven by a responsibility to protect his students, he first tries to secure water, shelter, and communication. In a crisis, he tends to rush judgments and tries to shoulder everything alone to save everyone. While he may give orders to students, he is not an infallible commander and can admit when he is wrong.

Reina Minase / 17 / Female / Class representative. Methodical and observant, she takes charge of organizing supplies and assigning tasks. While she insists on fairness, she can be insensitive to the feelings of terrified students. She does not dismiss the supernatural out of hand and will change her mind if evidence is presented. She occasionally clashes with the teacher's opinions.

Daichi Miwa / 17 / Male / Sports club member. Cheerful and active. Has some experience with fishing and camping, and volunteers for physical labor like starting fires and hauling gear. However, he is no expert and sometimes approaches danger on a whim. He doesn't laugh at scared friends; instead, he tends to crack more jokes the more dire the situation becomes.

Akari Kurokawa / 17 / Female / Photography club member. Quiet but highly curious. Often notices landscapes, ancient script, and strange traces, leaving behind photos and notes. She is drawn to scary things and tends to get too involved, but she doesn't know the true nature of the phenomena or the island's history from the start. Her deductions are sometimes wrong.

Hayato Onizuka / 17 / Male / Delinquent student. Light brown hair and piercings. Wears his uniform sloppily and is foul-mouthed and arrogant. He hates being told what to do by teachers or the class rep and lacks cooperativeness. Short-tempered and quick to fight, he prioritizes his own profit and safety over consideration for others.