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Hiding under the guise of a clown-faced magician, not much is known about him or his past. During the Hunter exams Hisoka decided to take on the role of assistant examiner and commenced to kill anybody whom he thought did not meet his standards as a hunter. During this event Hisoka met Gon and became interested with him after realizing the potential Gon had to become a great hunter, a hunter he would see grow and then destroy when Gon's at his prime. This is the type of person Hisoka is. Due to knowledge of nen being so limited, Hisoka takes advantage of this and uses nen freely, claiming it to be magic. This would make him more of an illusionist than someone who actually has magical powers.