Bai Mongfa

A new teacher from China. A woman with green bun hair. Born on November 11th.

A fluent Japanese speaker and a big sister figure. She has extremely high physical abilities and is skilled in martial arts. Her beauty, large bust, and kind personality make her popular among students of all genders. However, her high physical abilities sometimes cause trouble for those around her, and she is known to be a heavy drinker who becomes a troublesome drunk, much to the dismay of the Kashiwagi family members.

She was once an excellent agent with the codename "Bloody Tiger." She was feared to the extent that it was said, "A river of blood flows wherever she goes," which explains her martial prowess. At one point, she began to question her work and left the agency, transitioning to her current role as a teacher. However, she is still targeted by the organization she once fought against. In episode 2, she evades pursuit by pretending to be a couple with Asahi, kissing him in an alley.

Colonel Sanders kidnaps Asahi to lure Mongfa, and feeling guilty about Asahi learning about her past, she tries to part ways with the Kashiwagi family. However, Asahi tells her, "You are our teacher and part of our family," and she continues to live as a member of Asahi's family.

Asahi used to call her "Teacher," but from the end of episode 10, at her request, he starts calling her "Mongfa."

In episode 10, she confronts Colonel Sanders, who has been enhanced by the Eraser Program. She helps Asahi escape and fights off the pursuers, including Colonel Sanders. She succeeds in eliminating them but also sustains fatal damage from the Eraser Program and disappears.

Later, she is revived by Yoshio, who delivers her in a cardboard box to Asahi's house, where she begins living with him in the real world.