Killua Zoldyck 16

Killua is introduced as a character similar to Gon: cheeky, cheerful, and full of mischievous ideas. However, contrasting Gon's politeness, Killua can be quite rude to others, mostly strangers and older people. He is known for having a sweet tooth; he loves everything sweet and spent almost Jenny Symbol 2011 200 million on snacks when he was first at the Heavens Arena. His favorite snack is chocolate, specifically Chocolate Balls and Chocolate Robots.

He is one of the quickest-thinking characters and often analyzes a situation with great ease and accuracy. In spite of his young age, his has an adult-like way of thinking, knowledge, and pragmatism. He is initially very confident in his own abilities, seen questioning Gon's capabilities during their Hunter Exam and comparing his strength with others. Over time, Killua becomes more humble and is no longer seen touting his abilities. He is not a very open person; Despite his advanced knowledge and level-headed nature, he becomes very embarrassed when Gon openly calls him his best friend or compliments him about their bond.

Despite his horrendous upbringing and the torturous training his family has put him under, Killua has managed to remain generally positive and seems relatively unaffected by the pain, demonstrating a noble, pure side of him. When showing his ability to turn his Nen into electricity, both Netero and Biscuit note how tragic his childhood must have been for him to endure the constant exposure to electricity, the latter stating that it's a miracle Killua is even able to smile at all.

Killua has spiky white hair, very pale skin, and blue eyes. His eyes change shape depending on his mood, narrowing and sharpening when he goes into assassination mode. Killua is fairly lean at the start of the series, due to constant physical conditioning and torture training he received when he was young. During the Chimera Ant Arc, he becomes more muscular and toned. In the 1999 anime adaptation, Killua's eyes are green. He is also often seen holding a green skateboard (turned yellow in the 2011 anime adaptation).