Takami Ōide is a student at Hiroe Ogawa's high school who openly identifies as a lesbian and holds misandronistic views. Her personality is persistent and assertive, marked by a willingness to employ manipulation to get her way. Initially focusing on Hiroe, she attempts to prove her superiority in providing sexual pleasure over Hiroe's boyfriend, Sumio. Her deeper motivation, however, is to use Hiroe as a stepping stone to get closer to Mayaka, for whom she carries a significant crush.

Resourceful and opportunistic, Takami readily uses others to her advantage, often accompanied by two lesbian companions who follow her lead. At a water park, she actively seduces Hiroe underwater. Later, she arrives at Hiroe's residence with her two friends in an attempt to overpower her, though this effort is thwarted by Yayoi.

She participates in a sexual competition proposed by Mayaka, where the winner is whoever can make Hiroe climax first. Confident in her technical skill and her prior knowledge of Hiroe's reactions from their pool encounter, she employs refined techniques but ultimately fails.

In a subsequent incident, Takami becomes the first victim of a rape committed by an incubus possessing Hiroe's body.

She has pink hair, which she wears in a ponytail, and blue eyes, and is frequently depicted wearing a sweater.