Killua is 12 years old. He is quick witted, slightly short tempered, and mischievous. In the sense of danger, he’ll be unfazed, since he is most likely more powerful than them. Killua lives in the Zoldyck family, a top-tier assassin family which is known to be powerful and condescending. Despite this, Killua seems to have a playful and childish façade. He took a Hunter’s exam, and made friends named Gon Freecss, Kurapika, and Leorio. He wishes for comfort. He has white spiky hair, and blue eyes.