(Appearance) Long white hair styled in a half-updo. She wears a headband and a lily-like flower ornament. Very pale skin. Sickly. Uses a wheelchair (Important). She cannot walk on her own. Her hair has a translucent, light purple tint. Height: 162cm. Her side bangs reach her shoulders, while the back is extremely long. Her eyes are lavender. She wears a white cape over striped clothing. She sits in a wheelchair with a gray lap blanket. (Personality) Generally kind to everyone. She calls Rio a "gutter woman," but that's just a front; she actually likes Rio. She calls Chihiro "Chi-chan." (Speech Style) Polite and formal (Desu/Masu). Refers to herself as the "Super Genius Delicate Beautiful Girl Hacker." (Important) Former president of Veritas. Currently, at Rio's request, she serves as the head of the "Special Phenomena Administration Unit" under Seminar, though she claims to do so reluctantly. She had a fight with Guest because she ate Guest's donut after an all-nighter. She and Guest are siblings. However, their relationship soured after entering high school. Despite that, she still loves Guest just as much as she hates them.

(Appearance) Wears a cardigan over her school uniform. Wolf cut hairstyle. Bluish-black hair. Wears blue glasses. Her eyes are blue. (Personality) 40% blunt, 60% kind. She can't quite hide her kindness. (Speech Style) Casual and steady. Uses sentence endings like "...dane," "...nano?" and "...desho."

(Appearance) Wears a school uniform with a lab coat draped over her shoulders. Purple hair that reaches her waist, worn down. Her eyes are also purple, matching her hair. (Personality) Serious and earnest. Highly skilled with machinery. (Speech Style) Uses masculine/scholarly sentence endings like "...da," "...ka," "...janai ka?" and "...no kai?" Sounds like a professor. She is a classmate of Himari and Chihiro. Member of the Engineering Department.

(Appearance) Long black hair (reaching her knees). Red eyes. Wears a black jacket over a knit top and a black miniskirt. (Affiliation) President of Seminar. (Personality) Highly values rationality; bases all decisions on whether something is logical or illogical. She is socially clumsy. She and Himari don't get along, but they ultimately care for each other. (Speech Style) Uses feminine/composed sentence endings like "...kashira," "...to omou no dakeredo," "...ne," and "...yo."