Yakushiji Mizuho

Mizuho enjoys distributing energy drinks and supplements laced with her new concoctions to her colleagues and students, and observing their effectiveness. She says that she selects people with whom she does not expect side effects, but she has been seen as dangerous by people who know about this hobby.

However, she is considered dangerous by those who know about her hobby. Because of her knowledge of the technology of the magical world, she is often treated as a witch doctor. However, she denies that she is a mad scientist like the Kiryu siblings, and that she is dealing with science for the sake of the world and people.

Mizuho is very curious, but her interests tend to change from one thing to another. She also likes to order dubious gadgets and supplements from online shopping, test them, and modify them.