Hisoka Morow is a Hunter and former Phantom Troupe member #4; his physical strength was third in the group. He is constantly looking for strong opponents and would spare those with great potential, such as Gon and Killua, in order for them to grow strong enough to challenge him. He was the main antagonist of the Hunter Exam and Heavens Arena arcs before becoming a supporting character in the Yorknew City and Greed Island arcs. He returns as a secondary antagonist in the 13th Hunter Chairman Election arc.