Arka

Arka is a player of the game Greed Island. He appears right after Motarike fails to steal Gon and Killua's Sword of Truth card. Using 2 Pickpocket cards to randomly steal the cards that the two boys have gathered. However, because they have taken precautionary actions to protect the cards, all Arka gets is a simple stone that can be found everywhere. Running out of tricks and realizing that they are very smart, he gives up.