Kalluto Zoldyck

Kalluto Zoldyck is the younger brother of Killua. He was initially introduced accompanying his mother during Gons retrieval of Killua from his home on Kukuroo Mountain. Kalluto appears again during the Yorknew City arc assisting his older brother Illumi with the assassination of the ten mafia dons that placed bounties on the Phantom Troupes heads. After the Phantom Troupes entrance into Greed Island Kalluto joins as Hisokas replacement. During the Phantom Troupes assault on Zazans palace in Meteor City he reveals he joined the Spiders with the intention of bringing Killua back home.