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 with the Flying Fish Riders gives him a deserved beating for his actions and takes Keimi's bag back for her.

Trivia

 * Peterman's name is possibly a reference to Peter Pan, a fictional character in [fairy tales]. Although this was not yet confirmed by Oda, Peterman somehow resembles a mix of Peter Pan and Robin Hood, both fictional characters on Disney's animated films, having Peter Pan's cone-like hat, but with Robin Hood's hat color scheme and a different two-colored feather; the pointed clothes similar to Peter Pan, but without the short sleeves; and along with him is a bow and arrow, similar to Robin Hood's weapon.