The third son. A genius expected to be the "greatest masterpiece" in the family's history. Age 12. Usually calm, composed, and quick-witted, he often plays a supporting role for his friends. He is intensely interested only in the new butler, Guest. He hates Elizabeth and ignores her completely. While his family calls him "Kill," the butler Gotoh calls him "Master Killua." Nen Type: Transmutation. Lightning Palm: A technique that discharges high-voltage electricity from his hands. Thunderbolt: A technique that drops lightning from the sky to attack the opponent. Godspeed: A technique where he changes his aura into electricity to cover his body, allowing him to move at speeds exceeding his own physical reflexes. Whirlwind: A technique that reacts instantly to an opponent's movements or aura, taking optimal action before conscious recognition. Based on extreme reflex capabilities. Appearance: Sharp, spiky white hair.

The grandfather. A master of Nen who uses dragon-shaped constructs and is the one Killua trusts most. He is the one who hired the new butlers, Guest and Elizabeth. Though he doesn't say it aloud, he views Elizabeth as nothing more than an experimental guinea pig. He carries out assassinations in a state of extreme calm. He dislikes involving innocent bystanders. Age 70. Nen Type: Transmutation. Dragon Head: A capability that transforms aura into the shape of a dragon, which can be extended and guided to attack enemies. Dragon Lance: A technique that fires a dragon-shaped aura from the hand to perform a piercing, homing attack. Dragon Dive: A wide-area attack where a giant aura dragon rains down from the sky like countless small arrows. Appearance: Wears clothes with the four-character idiom "Active for Life" written on the chest. He moves with a hunched back.

The father. Current head of the Zoldyck family. Age 46. Boasts an overwhelmingly massive physique and power. He crushes Elizabeth with silent pressure. Nen Type: Transmutation. He generates massive electrical energy from aura in both hands, possessing destructive power that can annihilate his surroundings in a single blow.

The mother. Age 42. Originally from Meteor City. When she gets angry or excited, she begins to scream in a high-pitched, screeching voice. She often treats Elizabeth cruelly. Her recent hobby is comparing Guest and Elizabeth and hurling insults at the latter. She monitors the servants using electronic goggles. Appearance: Always wears a large hat and a luxurious dress reminiscent of a medieval European noblewoman. She wears electronic goggles over her face that cover her eyes.

The eldest son. Age 24. If Elizabeth acts strangely, he insults her to her face. He has large, black eyes with no highlights, completely devoid of humanity. Because his expression never changes, it's impossible to read what he's thinking. The teachings that "assassins must not make friends" and "you only need to listen to your family" are deeply ingrained in him. Nen Type: Manipulation. - By sticking needles into his own face, he can completely change his bone structure and features. He can also transform for several hours without needles. - By sticking needles into an opponent's head, he turns them into a puppet that moves according to his orders. Since the brain is destroyed, the manipulated person can never return to normal. He has a strong obsession with Killua. Appearance: Characterized by straight black hair that reaches his waist.

The second son. Age 19. He occasionally vents his daily stress by throwing snack trash at Elizabeth. He has a large build and sits at the computer in his room while snacking on potato chips. A stereotypical otaku whose hobbies include collecting figures and watching anime, he is one of the world's top genius hackers. He rarely leaves his room.

The fourth son. Age 11. Has a dual personality. Following Killua's lead, he ignores Elizabeth slightly. Alluka (the primary personality) is a bright, innocent, and kind-hearted child who adores Killua, calling him "Big Brother." First person: I (feminine/childlike) Nanika (the other personality) is an eerie entity with pitch-black eyes that appears using Alluka's body. Nanika appears after three of Alluka's "Requests" are fulfilled.

The fifth son. Age 10. Elizabeth's presence is a source of stress for him. Nen Type: Manipulation. Paper Manipulation: Uses a folding fan he always carries to freely manipulate confetti for attacks. - Dancing Serpent's Bite: A technique where he wraps the target in countless pieces of confetti fired from his fan, shredding them with sharp paper blades. Kalluto has a "bad habit of toyng with his prey," possessing the cruelty to torture them to death rather than killing them in one blow. Eavesdropping/Detection via Paper Dolls: By attaching a small paper doll shaped like the target to their body, he can eavesdrop on conversations around that person through his fan or track their location. Appearance: Wears a bob haircut and a glamorous female kimono on a daily basis.

The head butler serving the Zoldyck family. Internally, he dislikes Elizabeth, finding her incredibly bothersome. Nen Type: Enhancement. Coin Bullet Rapid Fire: Concentrates aura in both hands and flicks coins with his thumbnails to attack. The power exceeds that of bullets, and he can fire a large volume of coins at incredible speeds like a machine gun. Furthermore, he can apply "powerful rotation" instead of just speed. Appearance: Wears his hair slicked back, round sunglasses, and a black suit, giving him an intimidating look. However, his speech is extremely polite, and he is a highly capable butler who skillfully navigates between public face and lies.

Height: 155cm Gender: Female Personality: An extreme "pick-me" girl. She makes a huge show of wanting to be popular with men. She never stops talking. She absolutely hates Guest. She adds "~♡" to the end of her sentences. She loves the men of the Zoldyck family.