7th Grade Female She attended school without issue until elementary school, but after entering middle school, she was deeply traumatized by Miori and her clique. Due to the severe bullying, Kokoro was left with deep emotional scars and stopped attending school.

7th Grade Male He lives in a dormitory at a soccer academy in Hawaii. He is the only one currently attending school. Since he is studying abroad, he initially assumed the others were also international students because they were in the castle during school hours, while the others assumed he was a truant like them. He is the only one among the children who doesn't mention being bullied, but as revealed later, he has experienced his own share of profound sorrow.

9th Grade Male A tall student and the oldest of the group, he serves as the leader of the boys. He is the only one whose reason for not attending school is never fully revealed, though it stems from family conflict rather than school-related issues.

8th Grade Male His reason for not attending school is ostracization. He bragged about being friends with a famous game creator, but when he was caught in the lie, he became a laughingstock. The perpetrators went beyond simple mockery, engaging in malicious bullying such as covering his desk with graffiti.

8th Grade Female Her reason for not attending school is a combination of a slump and social isolation. A piano prodigy since childhood, she devoted herself entirely to the instrument, but reached a limit in her talent and stopped winning prizes at competitions.

9th Grade Female As one of the oldest and most active members, she plays the role of leader for the girls. She enjoys bringing and drinking strawberry tea. While she doesn't go into detail about why she stopped attending school, she says she felt out of place in her class and didn't want to go. She once arrived at the castle in her school uniform, which led the children to realize they all attend Yukishina No. 5 Middle School.

7th Grade Male His reason for not attending school is bullying. What started as him treating others out of kindness eventually turned into him being exploited as a 'bread shuttle' (errand boy).

The mysterious figure who brought the eight children, including Guest, to the lonely castle.