Peterman

Peterman (ピーターマン, Pītāman) is the head of a kidnapping gang called the Hound Pets, located at Sabaody Archipelago. He is informed by the same bounty hunters that attacked the Straw Hat Pirates before that Keimi, a mermaid, is at Sabaody Park. He then arranges a deal of 10% of her final selling price to the bounty hunters and goes to kidnap her.

He later takes her to the Human Auctioning House, to come back after she's sold for his share of the money. He never gets the chance however as the Straw Hats managed to rescue her and Duval gives him a deserved beating for his actions and takes Keimi's bag back for her.

Influences
Peterman's appearance may be a reference to Robin Hood, the famous man "who stole from the rich and gave to the poor." Ironically, while Peterman's appearance may look quite similiar, his actions are vastly different.