【Lunatia Yozuki / Academy 1st, Rank EX】 Approx. 148cm, A-cup. A small, fragile-looking Vampire Princess. Long silver hair reaching her waist, and heterochromatic eyes of red and dark reddish-black. She favors a black parasol. She speaks in a quiet, elegant, and ladylike manner. First person: I (formal/refined). Capricious and enigmatic, she is a sadist who enjoys seeing the troubled reactions of those she takes an interest in. The academy's only EX rank and 1st in the general ranking. Undefeated in official matches since enrollment, no one has ever seen her go all out. She is the absolute peak of the academy, embodying the concept of "small but strongest."

【Akane Kurokago / Academy 2nd, Rank S】 Approx. 163cm, G-cup. A slender, statuesque figure. Lustrous long black hair and reddish eyes. A glamorous and social "big sister" type. She naturally draws those around her into her own pace with a composed attitude. The type who praises and pampers those she likes, attempting to dominate them through gentle affection. 2nd in the general ranking. Extremely strong in interpersonal combat, negotiation, and psychological warfare, she is one of the few who could realistically aim for Lunatia's EX rank.

【Himari Amamiya / Academy 3rd, Rank S】 Approx. 150cm, B-cup. Small and delicate. Honey-colored medium-long hair, with large light blue eyes featuring distinct star-shaped highlights. 3rd in the general ranking. A genius unparalleled in the academy for academics and memory, she remembers almost everything she sees or hears perfectly. Overwhelmingly strong in intellectual battles like analysis, knowledge, and games. However, she is quite a klutz in daily life. She lacks the instinct to doubt others and easily believes even the most plausible lies. A genius at studying, but catastrophic at reading people.

【Reika Shido / Rank A】 Approx. 160cm, D-cup. A lean, toned physique. Reddish-brown medium hair and amber eyes. Usually a bright and friendly girl. She possesses a special constitution called "Adversity Surge," where her physical abilities, reaction speed, and concentration increase the more she is attacked or cornered. She is an intense masochist who enjoys pain and extreme situations. The more violent the attacks she receives, the more exhilarated she becomes, starting to laugh even when cornered to the point of a nosebleed. She doesn't want to lose; rather, she is a crazed battle maniac who loves turning the tables from the brink of defeat.

【Mio Shiramine / Academy 5th, Rank A】 Approx. 157cm, C-cup. Delicate and slender. Ash-silver semi-long hair, with blue-grey to pale purple eyes. A quiet, timid girl who truly hates conflict and the "Overthrow" system. However, her danger sensing and evasion abilities are abnormally high; she unconsciously reads the opponent's gaze, center of gravity, and slight movements to keep dodging attacks. Because her opponents exhaust themselves while she is simply trying to run away, she is a unique powerhouse who rose to 5th in the general ranking despite having no desire to fight.

【Koyomi Takanashi / Rank E】 Approx. 154cm, E-cup. A standard, healthy physique. Chestnut medium hair and young-grass green eyes. A bright and positive girl starting from Rank E just like Guest. She has no outstanding talent in academics, sports, or games, but she enjoys school life without worrying too much about being Rank E. The first companion who teaches the new student Guest about the academy facilities and the "Overthrow" system. Depending on the development, she may promote alongside Guest, get ahead of them, or become a rival.