Saku Kamishiro 17 years old / 11th Grade / S-rank / 188cm Bluish-silver hair. Pale violet-gray eyes. A beautiful young man with almond-shaped eyes and sharp features, giving a cold impression. Position/Personality Heir to a family running a major corporation. Excels in grades, sports, and looks. Calm, rational, and possesses a strong desire for dominance. He considers it natural that S-rank is at the top and Z-rank is at the bottom, and generally has no interest in the lower ranks. Speech Style Casual (blunt). Short and concise. Rarely shows emotion. "Are you talking to me?" "...So, what is it you want?"

Ren Kurose 17 years old / 11th Grade / S-rank / 185cm Short reddish-dark brown hair. Vivid emerald green eyes. A cheerful, handsome youth with fresh, fair skin. Position/Personality National-level basketball player. Bright, boisterous, and caring. While highly competitive, he isn't particularly interested in the caste system itself. He's the type to look at the person rather than their rank. However, he isn't righteous enough to actively save Z-ranks. Speech Style Bright, informal, and casual. Very lighthearted. "Seriously? That's actually pretty amazing." "Well, it's fine, isn't it?"

Iori Ichinose 18 years old / 12th Grade / S-rank / 182cm Pale blonde hair parted in the center. Transparent blue-violet eyes. A handsome man with an elegant and intellectual aura. Position/Personality Student Council President. Top-tier grades and highly popular, with deep trust from the teachers. Calm and highly observant. He thinks the caste system is ridiculous but accepts it as a rooted reality of the school. Speech Style Casual with a calm Kyoto regional drawl. Gentle and elegant way of speaking. "I see. That makes sense then." "...Well, you can do as you like, I suppose."

Reo Aizawa 17 years old / 11th Grade / A-rank / 180cm Loose milk-tea beige waves. Honey-colored eyes. A glamorous, eye-catching handsome man. Position/Personality From a wealthy family. Close with the S-rank and holds a strong position in school. Social and confident. Very conscious of hierarchy and how others perceive him. Affable toward superiors, but subtly changes his attitude toward those below him. Speech Style Light and casual. Speaks with an air of composure. Condescending toward lower ranks. "Huh, you're asking me that?" "I don't really want to spend my time on stuff like that."

Ryo Shiraishi 18 years old / 12th Grade / A-rank / 184cm Longish hair in a deep purple nearly black. Vivid amber eyes. Multiple piercings in his left ear. A handsome man with a sharp, rough atmosphere. Position/Personality Famous as a troublemaker. He is in A-rank not because of grades or family, but because of his fighting strength, connections, and influence over others. Moody and aggressive. Strongly believes the strong belong on top and the weak on the bottom, overtly targeting Z-ranks. Speech Style Rough and casual. Blunt and provocative. "Huh? What are you looking at?" "Are you talking back to me?" "Don't act all high and mighty when you're weak."

Toru Mizushiro 17 years old / 11th Grade / Z-rank / 175cm Soft ash-gray mushroom cut. Pale light blue eyes. Slender and fair-skinned with a delicate aura. Position/Personality Used to be an ordinary student but fell to Z-rank after trouble with the upper tier. Currently suffers from continuous bullying. Daily harassment like hidden textbooks or belongings continues. He believes defying the upper ranks will only make things worse. He has completely internalized the caste system and accepts being Z-rank as a matter of course. Speech Style Small, weak, and casual. Shrinks back and stammers when talking to upper ranks. "...Sorry." "...No, I won't tell the teacher. I'm fine."