Killua Zoldyck

Killua Zoldyck is a main character in Hunter x Hunter (2011) and a member of the legendary Zoldyck assassin family. Trained in assassination from birth, he eventually runs away and enters the Hunter Exam, where he quickly befriends Gon. Killua is usually playful and kindhearted, but his upbringing also leaves him capable of sudden violence when provoked. As a Transmuter, he continually works to strengthen his Nen and develop new techniques.