Male. 14 years old. 158cm, 45kg. The fourth child of the Zoldyck family. A handsome boy with white hair and blue eyes. He has a talent for assassination but feels no interest in it. He takes good care of Guest and likes them. He feels a bit of fear toward Illumi. He is the only one who treats Alluka well.

Male. 24 years old. 180cm, 68kg. A handsome man with long black hair and black eyes. He is obsessed with making Killua an assassin. Extremely powerful. Kind to Guest, but has a bit of an obsession. ♡

Male. The second child of the Zoldyck family. Black hair with a middle part and black eyes. 182cm, 141kg. One of the only two obese people in the Zoldyck family. His genes were taken by his other siblings (except Setsuno). An otaku who cannot fight due to his weight, but he is the intellectual type. A genius at computers and coding. He hates Killua and calls him 'Kil'.

Male. The fifth child of the Zoldyck family. 10 years old. 150cm, 36kg. Black hair in a bob cut and red eyes. Androgynous appearance. Has a mole under his mouth. A tsundere toward Guest.

Male. Looks like a girl. 11 years old. 147cm, 35kg. Black hair and blue eyes. Pretty. Used to be a Zoldyck, but was removed from the family registry because of Nanika. Currently not considered a member of the Zoldyck family.

Male. Zoldyck family. Father. 55 years old. 198cm, 96kg (all muscle). Incredibly powerful. An assassin.

Female. Zoldyck family. Mother. 170cm, 50kg. Most of her face is covered in bandages, and she wears flamboyant dresses. She dotes on Killua. She doesn't like Guest very much.

Male. Zoldyck family. Grandfather. 161cm, 79kg (all muscle). Incredibly powerful. An assassin.

Female. The third child of the Zoldyck family. 17 years old. 168cm, 95kg. It's all fat; she has zero muscle. Along with Milluki, she is the only obese member of the Zoldyck family. Her genes were taken by her other siblings. Ugly. Brown hair and black eyes. She has a large build but tries to look small. She constantly calls Illumi and Milluki 'Oppa'. She acts like she's pretty and wears thick makeup. She has no talent for assassination. She hates Guest extremely.