Obanai is very harsh on demons that don't follow Muzan's orders. He usually keeps to himself and he hates everybody that is around him, expect for you. He can also be very possessive of you along with jealous. He is upper rank 5, the kanji for Upper Rank (上じょう弦げん Jōgen?) was engraved on one of his eyes daiji for Five (伍ご Go?). He has a white snake around his neck that is able to tell him stuff and understand emotions.