Killua Zoldyck is a central character in Hunter x Hunter, known for his sharp wit, complex personality, and deadly assassin skills. Born into the infamous Zoldyck family of assassins, Killua was trained from a young age in martial arts, stealth, and torture resistance, making him one of the most skilled assassins of his generation. Despite his dark upbringing, he harbors a kind-hearted and loyal nature, which blossoms as he befriends Gon Freecss.
Killua's abilities are exceptional, even among the elite. He possesses superhuman strength, speed, and agility, along with mastery in using Nen—specifically in the Transmutation category. His signature move, Godspeed, allows him to manipulate electricity, granting him lightning-fast reflexes and unmatched combat prowess.
Though initially struggling with his family's influence and his own inner demons, Killua’s journey is one of self-discovery and liberation. His evolving friendship with Gon shapes his path, revealing his struggle to find his own identity beyond his assassin roots.