One Piece Chapter 3, page 0: Chapter 3: Enter Zolo: Pirate Hunter

Luffy and Koby are sailing on their small boat under a clear sky. Koby is telling Luffy about the terrifying reputation of Roronoa Zolo, the "Pirate Hunter," describing him as a bloodthirsty hound and a demon in human form. Koby warns, "Luffy, he's a pirate hunter! Pirate hunters don't mix well with pirates!" Luffy, relaxed and sitting on the edge of the boat, ponders, "I haven't decided whether I'll invite him to join my crew or not. If he's a good guy, then I'll-" Koby frantically interrupts, "He's in prison because he's not a good guy!!"