Machiko Iwabuchi is a teacher at Kamogawa Girls High School who serves as Madoka Kyouno s homeroom instructor. She is a former member of the school s Jersey Club together with Youko Nakaizumi, and she remains an avid supporter of the club s activities, particularly those involving Madoka. She typically wears a grey jacket with grey pants and a white button up shirt. Machiko presents a strict and tough demeanor toward others, especially toward Madoka, because she believes it is important for Madoka to learn to solve problems on her own. Behind her stern exterior, she cares about her students and wants them to grow into capable individuals. Her past involvement in the Jersey Club gives her a deep connection to the school s traditions and a personal stake in the club s continued spirit. As a supporting character in the original video animation, Machiko provides grounded, adult perspective to the events unfolding around the younger protagonists and helps bridge the school s history with the present. Her primary motivations stem from a sense of responsibility as an educator and a genuine desire to see her students succeed. Machiko does not possess supernatural or combat abilities, but she is perceptive and dependable in her role as a teacher and former club member. Her relationship with Youko Nakaizumi is a significant one, as the two were once clubmates and maintain a friendly rapport. Over the course of the story, her interactions with Madoka show a measured but meaningful development, as she learns to trust Madoka s judgment while still offering guidance when necessary.