Ougi appears to be a girl with short black hair, black pupils, and pale white skin. She is a junior of [Koyomi Araragi](https://anilist.co/character/22036/Koyomi-Araragi) at Naoetsu Private High School. Ougi often talks to Koyomi about oddities, and helping him remember what he knows. Her catchphrase is, "I don't know anything, Araragi-senpai. It's you who knows."
Ougi is mysterious and can come off as spooky/creepy. She also speaks in a condescending tone towards Koyomi and [Hanekawa](https://anilist.co/character/22055/Tsubasa-Hanekawa). Furthermore, Ougi is capable of pulling off many things, despite what she says about what she knows.
~!As of Hanamonogatari and afterwards, chronologically, Ougi refers to himself as a boy. Others will question Ougi's identity when they first meet him as they knew him as a girl before, but they all shrug it off and seem to doubt themselves as to whether he was a girl before. An example being when [Suruga](https://anilist.co/character/22054/Suruga-Kanbaru) asks about it and was told that he has always been a boy since he was born. [Nadeko](https://anilist.co/character/22050/Nadeko-Sengoku) and Koyomi have also have a similar experience. Suruga herself refers to him as 'Ougi-kun', 'he', 'this guy', and 'the boy'. As of Musubi, Ougi seems to be a girl once again, now remaining in the classroom seen in Ougi Formula.!~ ~!The reasons for this seems to be due to Ougi connecting to Suruga after Koyomi graduates, therefore becoming her other side. Thus, Ougi becomes a boy and seems to pretend its the first time he meets everyone afterwards. After Suruga herself graduates, it's likely that Ougi no longer has anyone to connect to and becomes a girl that guides others in the odd classroom.!~
