Yuki is a classmate of the Marui sisters and can often be seen hanging around with her friends Miyashita, Miku Sugisaki, and Mitsuba Marui (when she isn't being a jerk).
The anime describes her as eager to please and a person who enjoys love stories. She is a kind hearted young girl who often slips deep into romantic delusions anytime a male and female are mentioned in the same sentence.
Yuki is a character in both Mitsudomoe anime series, Mitsudomoe and Mitsudomoe Zoryochu!, published by Aniplex with animation production by Bridge and the manga series Mitsudomoe, published by Akita Shoten and serialized in Weekly Shonen Champion. Yuki's original design is credited to manga writer and illustrator Norio Sakurai while her anime version is credited to Takaharu Okuma. Yuki makes her first voiced anime appearance in Mitsudome episode 5, "Bra! Bra! Pig!".