Yuugi Hoshiguma is an oni who lives in the Old Capital within the Underworld. She once lived on Youkai Mountain as one of the Big Four of the Mountain before the creation of the barrier that surrounds Gensokyo. She now lives alongside the Youkai of the underground and many vengeful spirits. She is said to be one of, if not the most physically strongest character in all of Gensokyo, as even Suika Ibuki, another oni, admits Yuugi is stronger than her. Like all oni, Yuugi loves her sake. A lot.