Hisoka is entirely self-serving and self-absorbed; he does whatever he likes as long as it pleases him in some way. His insatiable love and lust for spilling the blood of powerful fighters in combat and his enjoyment of extreme pain while doing so fuels his seemingly sadomasochistic desires. In order for them to grow to their full potential (to improve the pleasure of killing them later), Hisoka allows his victims to where he can easily kill them.