Masami Onigata is a supporting character in the anime Seiren. She serves as the homeroom teacher for the protagonist Shouichi Kamita's class at Kibito High School. She teaches English and is known for having a very gentle personality. Her name carries meaning, with "Masami" translating to "elegant" and "beautiful," while "Onigata" combines the characters for "demon" and "type." She is a married woman, a detail that distinguishes her from similar teacher characters in the franchise's predecessor. Her personal likes include forgetting about work while shopping for and cooking dinner, and her dislikes include tying her husband's necktie. She has a naive side, as seen when she asks Shouichi, who is undecided about his future career path, on the spot whether he would like to become a cartoonist, even suggesting he come up with a strange manga story. Despite her limited on-screen presence — she makes few special appearances across the series — she occupies a minor but consistent role as a supportive figure in the school setting. Her interactions are primarily with Shouichi and his friends, though she does not drive any major plot arcs or undergo significant personal development. Her portrayal maintains the tradition of a calm, maternal presence in the classroom, embodying the role of a responsible yet approachable educator. She has no notable abilities beyond those typical of a high school English teacher, and her importance lies in anchoring the everyday school environment rather than in any dramatic or transformative functions within the story.