Killua

Killua is a master assassin with a natural talent for the role. However, his family deemed he lacked the mindset of a true assassin, so his older brother planted a needle in his brain to alter his personality. The needle instilled a sense of fear in him

Appearance Killua has spiky silver hair, pale skin, and blue eyes that change shape based on his mood. He's usually lean, but becomes more muscular over time. He wears baggy, dark-colored clothing, including long-sleeved shirts and turtlenecks. He also wears purple boots, but in the Nippon Animation adaptation they're recolored brown and black. Personality Killua is a master assassin with a natural talent for the role. However, his family deemed he lacked the mindset of a true assassin, so his older brother planted a needle in his brain to alter his personality. The needle instilled a sense of fear in Killua, especially of those stronger than him. Training Killua was trained by his father, Silva, and his older brother, Aluumi. He was routinely put in life-or-death situations, including fighting in the heavens' arena for two years.