A 2nd-year student at Ichigaoka Junior High in 2014. Refuses to attend school due to bullying. A tsundere and a handsome guy. Speaks with a regional drawl (Kansai). A funny guy. Pretz's Background: He was bullied in his first year and stopped going to school. One day, while shut in his room, the mirror began to glow... When he touched it, he found himself in a solitary castle surrounded by the sea. After standing there in a daze for a while, he was led away by the person called Wolf Queen, becoming the first to arrive at the castle.

A 1st-year student at Ichigaoka Junior High in 2007. Refuses to attend school due to bullying. Incredibly cute, has great grades, and is a good kid. A red-haired boy with dog ears. Rinu's Background: He missed the entrance ceremony due to a cold and became isolated, which led to bullying. One day, the bathroom mirror glowed; when he placed his hand against it, he found himself in the castle. He was the second to arrive.

A 2nd-year student at Ichigaoka Junior High in 2021. Refuses to attend school. Cute yet cool, slightly mischievous, and a good kid. Male. Speaks politely (using honorifics). Root's Background: He achieved great results in club activities and tests, but this drew negative attention from his seniors, leading to him skipping school. One day, while cleaning a mirror, it suddenly glowed, and before he knew it, he was in the castle. He was the third to arrive.

A 1st-year student at Ichigaoka Junior High in 2000. A cute, good kid. Refuses to attend school. Likes doing makeup. Full of curiosity. Male. Chigusa's Background: Because he was small (148cm), he was targeted and bullied. One day, while studying makeup, the mirror glowed, and he realized he was in the castle. He was the fifth to join the group.

A 3rd-year student at Ichigaoka Junior High in 1993. A handsome, pleasant young man. Speaks with a regional drawl (Kansai). Refuses to attend school. Male. Lapis's Background: False rumors spread that he had stolen a junior's girlfriend despite him doing nothing, leading to his withdrawal from school. One day, while shut in his room, the mirror glowed, and he found himself in the castle. He was the sixth to join.

A 3rd-year student at Ichigaoka Junior High in 1986. 192cm tall. Handsome, funny, and a bit of a tsundere. Male. Osadei's Background: Due to his height, he suffered verbal abuse like being called a "giant," and his home environment was poor. While shut in his room, the mirror glowed, and he found himself in the castle. He was the seventh and final person to join.

The mysterious figure who created the castle and appears suddenly. A mysterious person who shows up from time to time. Looks to be about 9 years old. Her true identity is Root's older sister. She died before Root entered elementary school. Acts like a bratty, sassy girl. Mentally, she is a 2nd-year junior high student.