The Committee Chairman, also known as the Committee Chairperson, is a 17-year-old female student in Natsuru Senō and Akane Mishima's class at Seitetsu Gakuin High School. Natsuru Senō assigns her the title of class chairman, though its official status remains unclear. She presides over a trio including the Assistant Committee Chairperson and the Treasurer. This group frequently targets Natsuru Senō during his experiences in female form, devising schemes to exploit his situation for financial gain and entertainment, significantly complicating his school life.

Exhibiting a domineering and opportunistic personality, the Chairperson often crafts plans to humiliate Natsuru or profit from his involuntary gender transformations. Her motivations stem from amusement and a desire for control within her social circle. Novel-based lore references an elder sister connected to the Chairperson, but provides no further details about this relationship or its implications.

Across all official media, including OVAs, films, or spin-offs, the character maintains a consistent role as an antagonist within school scenarios focused on Natsuru's group. No concrete information exists regarding character development, expanded backstory, evolution, or deeper exploration beyond these interactions.