: Ougi is famous for the line, "I don't know anything. You're the one who knows, Araragi-senpai," which often serves as a psychological trap to make Araragi admit his own buried knowledge.
: Ougi is depicted as genderfluid or non-binary. While they typically appear as a girl to Araragi, they manifest as a boy in the Suruga Devil story to Kanbaru Suruga, stating they have "always been" male. Oshino Ougi
: In the Ougi Dark arc, it is revealed that Ougi is not a human relative of Meme Oshino, but an oddity (aberration) created by Araragi's own self-hatred and desire for self-correction. They serve as his internal critic, materializing his subconscious guilt and "correcting" the world as they see fit. : Ougi is famous for the line, "I don't know anything