Soi Fon, born Shaolin Fon, is the captain of the 2nd Division. She is a hard worker, with a tomboy appearance, who believes strongly in following orders. She is also outwardly antagonistic to her underlings, as she believes this keeps them on their toes. During her childhood, she served as a bodyguard and eventual protégé of Yoruichi Shihōin, with whom she developed a close relationship. When Yoruichi left Soul Society, Soi Fon was crushed by the fact that Yoruichi did not take her with her. When Yoruichi returns to Soul Society a century later, Soi Fon engages her in battle. After asking the question of why she was left behind, to which Yoruichi's answer is not heard, the two make amends. The two's relationship has become somewhat of a running gag: Soi Fon consistently displays an obsessive, almost romantic, interest in Yoruichi. She likes anything resembling a black cat (a form Yoruichi can assume at will), and displays jealousy should Yoruichi be in someone else's company.