Yuki is possessed by the rat in the Chinese zodiac. The rat in the story of how the Chinese zodiac came to be decieved the cat into thinking that the feast is on the day after. He is called the prince in their highschool and the most popular guy. Although people see him as a kind person, they can also feel the wall that Yuki had put up against others. Yuki describes himself as someone who gives out candy to others just to be liked, but still being unable to put down the wall he had created.
Yuki felt like he is a prisoner under the watch of Akito, the head of the Sohma family, and his relatives. Because of this, he wants to live a normal life outside of the Sohma household's reach, but ended up living in his cousin's house instead. He envies Kyo's freedom from all the family pressures and charisma and gets annoyed every time Kyo mentions that he wants to be in the same position as Yuki in their family.