Illumi Zoldyck

Illumi Zoldyck (イルミ＝ゾルディック) is the eldest child of Silva and Kikyo Zoldyck. During the 287th Hunter Examination, he appeared under the guise of Gittarackur (ギタラクル). Illumi currently seems to be the only person that Hisoka claims as a friend, although their relationship is unconventional.