One Piece Chapter 2, page 14-15: THEY CALL HIM "STRAW HAT LUFFY"

Koby gains confidence, shouting, "WELL, I'M GONNA DO IT!!! WHAT'VE I GOT TO LOSE!? I DON'T WANNA BE A MISERABLE CABIN BOY MY WHOLE LIFE!! I'LL JOIN THE NAVY... AND THEN... I'LL CAPTURE ALVIDA!! BETTER TO RISK MY LIFE TRYING TO ACHIEVE MY DREAM!" Suddenly, a voice booms, "WHO ARE YOU GOING TO CAPTURE, RUNT!?" as Alvida's iron mace crashes down with a massive "KRESH!", completely destroying Koby's coffin boat. Koby screams, "AAAH!!! MY BOAT!" Alvida glares at him, saying, "YOU LITTLE SNEAK! DID YOU REALLY THINK YOU COULD ESCAPE FROM ME!?

Alvida and her crew surround Luffy and Koby. Alvida asks, "IS THAT THE BOUNTY HUNTER YOU HIRED? WELL, HE CERTAINLY ISN'T RORONOA ZOLO... SO I'LL GIVE YOU ONE CHANCE TO REPENT... WHO IS THE FAIREST THROUGHOUT ALL THE SEAS? ANSWER ME!!!" Luffy looks at Alvida, points his finger, and asks, "HEY, WHO'S THAT TOUGH-LOOKING OLD BIDDY?" The entire crew and Koby burst out in shocked laughter and panic, with Koby screaming, "LUFFY!! TAKE IT BACK!! NO WAY!" Alvida growls in absolute fury.