Ougi Oshino (忍野 扇, Oshino Ōgi) is a mysterious first year at Naoetsu Private High School. Ougi claims to be the niece of Meme Oshino despite him having no known family. While commonly referred to and viewed as a girl, Ougi first claims to be male in Suruga Devil, in which they state that they are a boy and always have been. Ougi is the titular protagonist of four main arcs: Ougi Formula, Ougi Dark, Ougi Light, and Ougi Fright, and of two minor arcs: Ougi Travel and Ougi Reflect.