Souma, Yuki

Yuki is the rat of the zodiac. Known as "The Prince" or "Prince Yuki" at school, Yuki is very pretty and refined, and has many admirers at school, but has a hard time being social. He wishes that he could be with people as friends, rather than admired and worshiped from afar.

Yuki has suffered a traumatic childhood at the hands of Akito, the head of the Souma clan, who locked up and mentally tortured him. Because of this, Yuki has a somewhat low sense of worth and is claustrophobic. With Tooru's help, however, Yuki is gradually able to loosen up. He is jealous of Kyou because he thinks Kyou can have a normal life, which Yuki always wanted.

(Source: Wikipedia)