Benny Delon

Famous serial killer,every time he killed someone he made a knife engraved there in memory and a number, he has made 288 total. He then sold in his shop like other knives and swords he made.

"The cries of the victims and the expression give me inspiration," he says in a book he wrote in prison.

Gon and Killua find one of his knives in the Bull market in Shin York City.