Yuki Sohma is cursed by the spirit of the rat of the zodiac, which causes him to transform into a rat when hugged by the opposite sex or under stress. He lives with his cousin
Shigure Sohma and his rival
Kyo Sohma, and later befriends
Tohru Honda, a kind-hearted girl who helps him overcome his insecurities and fears.
Yuki is gentle, polite, refined, and intelligent. He is often called "The Prince" or "Prince Yuki" by his admirers at school, but he has a hard time being social and making friends. He wishes that he could be with people as equals, rather than admired and worshiped from afar.
Yuki's personality was shaped by his traumatic childhood, where he was isolated and abused by his mother and
Akito Sohma, the head of the Sohma family. He was also neglected by his father and his older brother Ayame, who he resented for not being there for him. He developed a low self-esteem and a fear of opening up to others, believing that he was unworthy of love and happiness.
Yuki's personality gradually changes after he meets Tohru, who accepts him for who he is and encourages him to pursue his dreams. He becomes more confident, expressive, and optimistic, and learns to connect with others and make friends. He also reconciles with his brother and forms a bond with his cousin Hatsuharu, who is his best friend and protector. He develops a romantic interest in Machi Kuragi, a fellow student council member who understands his loneliness and shares his love for gardening.