Killua Zoldyck

Killua Zoldyck is Gon Freecss's closest friend and the third son of the Zoldycks, the most notorious family of assassins in the world. His own relatives consider him the most talented killer the line has ever produced.

He has spiky white hair, very pale skin and blue eyes that change shape with his mood, narrowing and sharpening the moment he slips into assassination mode.

He is introduced as a character much like Gon — cheeky, cheerful and full of mischief — but where Gon is polite, Killua can be openly rude to strangers and to his elders. His sweet tooth is legendary: he spent close to two hundred million on snacks during his first stay at Heavens Arena, chocolate above all.

He thinks faster than almost anyone in the series, breaking a situation down to its parts in seconds. He was trained to kill from birth: tailing drills that routinely risked his life began at the age of three, and his resistance to poison is such that he drank Tonpa's spiked offering without hesitation and asked for four more cans.

He is the only person besides Alluka who knows the truth about Nanika, and it is that power he turns to in order to save his friend. Voiced by Mariya Ise in the 2011 series and Kanako Mitsuhashi in the 1999 one.