Killua is a boy with a calm and laid back personality, however, his ruthlessness and aptitude in killing show the other side of him—deadly, violent, and bloodthirsty. He is a member of a famous family of assassins, the Zoldyck Family. He is the third son of Silva and Kikyou. Killua is considered a promising member of the family but ends up running away from home and entering the Hunter Exam. Killua ends up meeting Kurapika, Leorio and Gon, the other three main characters of the series. Gon later becomes his best friend.
