Yuki is the love interest of Prince Lune in The Cat Returns, though just a minor character. It wasn't revealed until later that she was the dirty white kitten that Haru, the protagonist of the film, had given fish crackers to when Haru was a little girl. She was also the one who was unseen while telling Haru to visit the Cat Bureau. She was the one Lune had chosen for his bride, though his father, the Cat King, the main antagonist of the film, had intended for him to marry Haru as payback for saving him.