Yuki, born Hiroyuki Yoshida, is a tall and attractive trans woman living with her boyfriend Shiina. She takes an early interest in Yoshino when she believes Yoshino to be a boy, though remains on good terms with Yoshino even after learning of Yoshino's assigned sex, and gives Shuichi and Yoshino helpful advice when they are troubled. Despite the differences between their situations, Yuki sees much of herself in Shuichi: when they were growing up, Shiina was the only friend who stood by the young Hiroyuki, as she was called then, while girls teased her and the boys bullied her to change. Yuki always keeps up a positive attitude, and runs a gay bar. Since her transition, she has not been on good terms with her parents, who run a uniform store. Yuki is the main character of Takako Shimura's short story "Hana", in the collection Boku wa, Onna no Ko, in which her family—which consists of her father, mother, brother, and sister-in-law—also appears; Yuki is revealed to be a fan of Keiji Sada, a Shōwa period actor.