Milluki Zoldyck is the second eldest child of Silva and Kikyo Zoldyck. Milluki is short-tempered, selfish and rather immature for his age, still referring to his mother and father as mama and papa, and Illumi as Illu-nii or "Big brother Illumi". He often fights with his younger brother, Killua. He is an otaku, who has not left the Zoldyck Family estate since the age of 10. Milluki has a perfidious side, prompting a tourist to refuse Alluka's request for no reason. However, he is also a coward, as he is too afraid of Killua to seriously displease him, or of his father and grandfather to disobey them. Unlike his other siblings, Milluki spends the majority of his time in his bedroom playing with his computers. He takes great pride in his manga, anime, video games, and figurine collection. He even threatened to kill Killua, if he ever laid a finger on his figurine collection.

[Voice Samples]

https://www.youtube.com/watch?v=02WZDycfwtA&ab_channel=Flashbanger