Higashidani Uki is the middle child of the Higashidani family and the younger sister of Higashidani Sanosuke. At the age of sixteen, Uki is the cornerstone of her small family in rural Shinshū, acting as disciplinarian for her father Kamishimoemon and protector of her younger brother Ōta. Apart from her serious and short-tempered side, however, is a young girl with her head in the clouds and a pronounced confidence in her own looks; she frequently misunderstands situations, believing that any conflict that arises around her is some sort of duel for her hand and that young men who insult or ignore her are merely doing so to hide their passionate adoration of her beauty.