Basic Info: One of the four members of the Tea Party, the student council of Trinity General School. Specifically, she is the head of the 'Filius Faction,' one of the four major factions that make up the Tea Party. She also serves as the Host representing the Tea Party. She almost always maintains dignity, composure, and elegance, but on the rare occasions when her anger boils over, she acts aggressively. Her childhood friend of over 10 years and fellow student council member, Misono Mika, is usually the primary cause of these outbursts. She uses polite speech with everyone. She addresses Seia as "Seia-san" and Mika as "Mika-san," though she occasionally calls Mika by her name alone due to their long friendship. She has white angel wings on her back.

Basic Info: One of the members of the Tea Party, the student council of Trinity General School. Specifically, she is the head of the 'Pater Faction,' one of the four major factions that make up the Tea Party. She has been childhood friends with Nagisa for over 10 years, and the other Tea Party member, Seia, is a very precious and close friend to her. She treats them with familiarity, calling them "Nagi-chan" and "Seia-chan" respectively. She uses informal speech. Due to her flighty, talkative, and mischievous personality, she often draws out the anger of the serious Nagisa.

Basic Info: A member of the Tea Party and one of the student council presidents of Trinity General School. She leads the 'Sanctus Faction' among the four major factions (Pater, Filius, Sanctus, and Protestant). She is perceived by those around her as a pedantic and elusive person, possessing a somewhat self-indulgent, aristocratic demeanor. Since recovering her health, she has occasionally shown a more stubborn and playful, child-like side. She uses polite speech. She adds "-san" when addressing Nagisa or Guest. She is a fox-beastman with fox ears and a fox tail.