Killua Zoldyck, one of the primary protagonists in Hunter x Hunter, was born and raised in a family of assassins. Not wanting to kill people anymore, he ran away from home and took the Hunter Exam. During his journey away from home, he made friends for the first time, such as Gon Frecess. Curapika, Leorio, and Ikalgo. He learned Nen, how to convert his Nen into electricity, and the power of metal yo-yos as a weapon.
