Last but not least is Kalluto Zoldyck, the newest member of the Phantom Troupe just when he's ten years old. He is silent but obedient, seems to claim that he has a good relationship with his mother
Alluka Zoldyck is the youngest of the siblings so far in the manga. Due to unknown circumstances, a mysterious Dark Continent entity dubbed as Nanika comes to possess her and now they both live together in one body.
The heir of the Zoldyck family but despite that, he has no interest in it. He met Gon in the Hunter Examination. By default, Killua is a cheeky and mischievous person, he has an obsession with sweets.
Milluki is the second eldest son, unlike the rest of his brothers, he is a shut-in who never once stepped outside of the family’s mansion. While he doesn’t have the physical prowess and ability like his brothers, he’s a skilled hacker and programmer.
The eldest child of Silva and Kikyo Zoldyck, he is first introduced in a disguise as Gittarackur and reveals himself to Killua, asking him to come home.
There is not much known about the mother of the Zoldycks children just yet. But seeing that she herself is a member of the Zoldyck family, there is a chance that she is also a deadly assassin too.
He is the head of the Zoldyck family, a calculated man that will only act if victory is guaranteed. Just like his grandfather, he seemed to hold a high regard for Killua and has appointed him as the next heir