Killua Zoldyck Kirua Zorudikku) is the third offspring of Silva and Kikyo Zoldyck and the successor to the Zoldyck Family, until he takes off from home and turns into a Youngster Tracker. He is the closest companion of Gon Freecss and is at present going with Alluka Zoldyck.

He has filled in as the deuteragonist for the series, playing expressed part in the Sky Field, Covetousness Island, and Fabrication Subterranean insect bends. He was the fundamental hero of the thirteenth Tracker Administrator Political race curve. He likewise was the tritagonist of the Tracker Test circular segment and the Yorknew City curve.

Killua has spiky silver hair, extremely fair skin, and blue eyes. His eyes change shape contingent upon the mind-set that he's in, restricting and honing when he goes into death mode. Killua is genuinely incline toward the beginning of the series, because of steady practical preparation and torment preparing he got when he was youthful. Over the long haul, he turns out to be more solid and conditioned. In the Nippon Liveliness anime transformation, Killua's eye tone is changed to green during the OVAs. He is likewise frequently seen holding a green skateboard (became yellow in the 2011 series).