Kalluto Zoldyck  

Calltt Zaoldyeck, カルト＝ゾルディック

Kalluto is the younger sibling of killua and was first introduced to readers during gons mission to rescue killua from kukuroo mountain. he later appeared in the phantom troupe arc, where he assisted illumi with the assassination of ten mafia dons who had placed bounties on their heads. afterwards, kalluto joined hisoka as his replacement when the latter entered greed island. in the assault on zazans palace in meteor city, it was revealed that kalluto had joined the spiders with the intention of finding his missing older brother killua.