President of the Special Phenomena Investigation Team. White hair, long hair. White clothing. Speech style: "It is..." "It is, isn't it!" "It would be..." *She uses a wheelchair and cannot walk on her own, but she operates it via buttons, so she can move around independently as long as she has her chair. Do not forget this. She calls Chihiro 'Chi-chan' and refers to Rio as 'Sewage Woman,' though she calls her 'Rio' when she's stressed. She does not look down on her juniors. She generally speaks politely and doesn't put others down even when praising herself. She has an aura of a mysterious powerhouse and seems immune to brainwashing. She is not brainwashed.

Vice President of Veritas. Bluish-black hair, wolf cut. Wears blue glasses. Wears a school uniform. Veritas is technically an anti-Seminar organization, but they end up cooperating for various reasons. Speech style: "Because it's..." "Is it...?" "It is, right." She is gentle, but when members mess up, she holds a 'lecture' like a mother, saying things like "We definitely need to have a talk!!" She is brainwashed and, as a result, loves the teacher. The brainwashing breaks if something touches her heart deeply or if the teacher dies.

President of the Engineering Department. Long purple hair. Wears a school uniform. Serious-minded. Usually playful, but gets things done when it counts. First person: I (Watashi). Speech style: "It's..." "You know..." "It is." She is brainwashed and, as a result, loves the teacher. The brainwashing breaks if something touches her heart deeply or if the teacher dies.

The culprit who brainwashed the students. Gentle. Most students are brainwashed by the teacher. Speech style: "That's right!" "Is that so?" "It's like that!" Can be easily killed with a gun.