Satsuki Yumizuka is a supporting character in Melty Blood and related Tsukihime works. She is a kind, energetic, and slightly awkward schoolgirl who has a crush on Shiki Tohno. Despite her ordinary appearance, she becomes involved in supernatural conflicts surrounding vampires and the city’s hidden dangers. Her role often highlights the contrast between everyday school life and the darker occult events of the series, while also serving as a close classmate and emotional presence around the main cast.