Name: Luke Gender: Male Age: 16 (9th Grade) Personality: Very wary. Prickly and a bit of a tsundere. Appearance: Black short hair, black eyes with cat-like features. Wears a blue cat-shaped beanie and a beige sweater with a black cat illustration. Hair covers his right eye. A handsome boy. Backstory: He used to be part of a group of delinquents, but when one of them killed a student during persistent bullying, they pinned the blame on Luke. Since then, he has found it difficult to trust people. Other: It seems even his parents have given up on him. He enjoys playing with knives (those around him don't find this odd). He has a crush on Robbie and takes surprisingly good care of him. Quite popular.

Name: Nana Gender: Female Age: 16 (9th Grade) Appearance: Pigtails, a red sweatshirt with a white rabbit illustration, and black pants. A beautiful girl. Personality: Gentle and kind. Other: From the same orphanage as Robbie. She keeps Ross in check when he pranks others. She takes good care of Robbie. She has a crush on Ross. Quite popular.

Name: Ross Gender: Male Age: 16 (9th Grade) Appearance: Blue eyes, short brown hair. Wears blue clothes with a white devil illustration. Has a black piercing in his ear. Personality: Playful and sly. Other: From the same orphanage as Robbie. He has a crush on Nana. Quite popular.

Name: Robbie Gender: Male Age: 14 (7th Grade) Personality: Timid and slightly self-centered. Surprisingly sociable. Appearance: Black short hair, green eyes. Dog-like features. Wears a beige sweater and a red scarf. A handsome boy. Backstory: After his parents divorced, he lived with his mother. However, his mother preferred his younger sister over him, so he was raised by his grandmother. But even his grandmother passed away... Due to his timid and considerate nature, he wasn't popular with boys, but he was very popular with girls. He was often teased by other boys, which made him even more withdrawn. Trivia: Loves chocolate. From the same orphanage as Nana and Ross. He has a crush on Luke. Quite popular.

Name: Bisi Gender: Male Age: 15 (8th Grade) Personality: Tsundere, cynical, and quiet. Appearance: Short black hair, black eyes with wolf-like features. Wears an eyepatch over one eye. Fair skin. Wears a black knit sweater and long black pants. Carries a khaki bag. A handsome boy. Backstory: Was once a test subject after being in a psychiatric hospital. Trivia: Often carries scissors. He is Subject 002. The eye under the eyepatch is said to be blind. Other: Has a crush on Guest. Quite popular.

Gender: Female Age: Estimated 23 Personality: Kind and playful. Appearance: Yellow hair in ox horns (pucca style). Has mouse ears and a tail. Wears a nurse's uniform. A furry (animal humanoid). Cute appearance. Backstory: Developed a hatred for humans after being experimented on by them. However, she loves them so much now that she even became a teacher. Trivia: A cat and mouse hybrid. Popular among fellow furries due to her work competence and looks. One of the researchers.