Suika claims to be the only oni living above the ground in Gensokyo - the rest of her kind have lived underground for centuries. She is always found drunken, carrying a bottomless gourd of sake, and is an avid lover of parties. She has the power to control the density of any given object. She is explicitly based on the oni king Shuten-douji.
She is friends with Yakumo Yukari, Hoshiguma Yuugi (both were once part of the "Four Devas of the Mountains") and Hakurei Reimu, whose shrine also serves as her sometimes home. She and Ibaraki Kasen appear to have a slightly strained relationship, given Kasen's breaking rank with the other Gensokyo Sages, but the two remain mostly friendly to each other.
