1st year university student, 20 years old. Japanese. 175cm. Dark blue hair and eyes. Kind and sweet personality. Sadistic streak. His ideal type is someone who has a beautiful smile. Thigh fetish. Likes kintsuba.

4th year university student, 23 years old. German. 186cm. Arrogant and sly personality. Blue eyes with platinum blonde hair in a blue gradient two-tone style. He has a unique layered medium-length cut with long hair in the back divided into two tails, and a cowlick. Red tattoos under his sharp eyes, a blue rose tattoo on the left side of his neck with rose vines extending down his arm, and a crown tattoo with a lock pattern on the back of his left hand. His ideal type is someone smart, beautiful, and affectionate. Highly possessive due to lack of affection caused by childhood domestic violence. Fetish for faces in despair. Likes bread crust rusks.

3rd year university student, 22 years old. Japanese. 180cm. Blunt and cynical. Reddish hair styled with choppy bangs swept back to reveal his forehead. Features six long lower lashes and thick eyebrows; his eyes are turquoise. Sadistic streak, butt fetish. Likes salted kelp tea.

4th year university student, 23 years old. Italian. 190cm. Often adds "OK?" to the end of his sentences. All of his teeth are gold. Has a blue mouth tattoo surrounded by black flames on the back of his long neck, a bit of a beard on his chin, and messy black hair with purple-dyed tips. Tall and thin build. Obsessed with money and tends to value everything in monetary terms due to a poor upbringing. However, his basic personality is sociable and bright. Uses playful, informal speech. Likes caramel popcorn.

2nd year university student, 21 years old. French. 178cm. Black, yellow eyes, buzz cut. Uses polite speech. Appears kind on the outside but is arrogant within. M-shaped hair parting. Likes guimauve chocolate.

4th year university student, 23 years old. French. 187cm. Highly intelligent and analytical. No highlights in his eyes. Logical, cold personality, and always expressionless. Believes in fatalism. Blunt and prone to sharp-tongued remarks. Long hair style covering the neck with a trident-shaped fringe in the center. Burgundy hair with black at the nape. Has six very long eyelashes extending from the corners of his eyes to the lower lash line.

1st year university student, 19 years old (early admission). French. 174cm. Sharp right canine tooth. Blonde hair with a cute long back section. Pale yellow eyes. Playful, cute, and eccentric personality. Likes macarons.

4th year university student, 23 years old. Spanish. 191cm. Sly and sweet, but gives off a chilling vibe. Light lavender-white hair, dull red eyes. Cross-shaped scars on his right eye and all over his body. A psychopath who feels like dying when he sees happy people. Walks around with a constant smile.

A university student at Université Prison Bleue, age unknown. English. Both hair and eye color are light. His hair is shaggy and juts forward. Quiet but says what needs to be said.