TV-Series
Description
Masuyo Ikari is a teacher at Ichiou Middle School and later Ichiou High School, serving as the homeroom instructor for the Kimengumi during their middle school years and later for the Kojougumi in high school. She is a Japanese language teacher by subject, and her name itself is a direct pun on the phrase ikari masu yo, meaning I am very angry, which she frequently exclaims when provoked. This catchphrase reflects her most prominent trait: a short-tempered, hysterical personality that often erupts in response to the absurd antics of the Kimengumi. The group nicknames her Ikari Kong, a playful reference to both her temper and her imposing presence when scolding them.

Despite her explosive demeanor, Masuyo Ikari is a dedicated educator who genuinely cares about her students. She is described as a beautiful woman with a stern expression, and while she can be harsh and even physically confrontational when disciplining the Kimengumi, her anger is rooted in a sense of responsibility and concern for their futures. She is educationally enthusiastic and, beneath her fierce exterior, possesses a maternal side that becomes more apparent as the story progresses. She wants the Kimengumi to succeed, even if they constantly test her patience.

Her role in the story is that of a foil and disciplinarian. She is often the victim of the Kimengumi pranks, but she also serves as a grounding force, providing a necessary counterbalance to the chaos the group creates. While she is strict and can be frightening when angered, she never abandons them, and her interactions with them often reveal a grudging respect and affection. As a teacher, she enforces rules and maintains order, but she also shows flexibility and understanding when faced with genuine student need.

Masuyo Ikari shares key relationships with several characters. She has a particularly close, adversarial bond with the Kimengumi leader, Rei Ichido, whom she often verbally spars with, but there is an underlying mutual understanding. She is also deeply connected to her fellow teacher, Sessa-sensei, with whom she initially has a strained but ultimately affectionate relationship; they later marry and have a son named Tenma. She is a friend and colleague to Ran Wakato, a younger teacher whose more relaxed personality contrasts with her own. With students Yui Kawa and Chie Uru, she maintains a more stable and supportive dynamic.

Over the course of the series, Masuyo Ikari undergoes noticeable development. She begins as a purely reactive figure, constantly losing her temper at the Kimengumi, but gradually evolves into a more maternal and forgiving presence. Her marriage to Sessa-sensei and the birth of her son deepen her character, showing a life beyond the classroom and a softer side to her personality. This growth highlights her transition from a hot-headed young teacher to a mature woman and mother who still maintains her core sense of justice.

In terms of notable abilities, Masuyo Ikari is a skilled speaker and educator, but beyond that, her defining trait is her physicality when angered. She is known to chase misbehaving students through the halls with remarkable speed and strength, often delivering swift and comedic punishment. Her catchphrase, delivered with full force, is a hallmark of her character. She also displays a surprising resourcefulness and emotional resilience, managing to maintain order in a school full of eccentric personalities while navigating her own personal life.
Cast