Hamu

Hamu (ハムウ) is a character seen in the first TV special, "Adventure in the Ocean's Navel".

History
For ten years his village was plagued by attacks from monsters who were released when Captain Joke invaded in the mountain of the Gods after pillaging his village. Hamu's mother, the village chief, went to stop him but was killed by Joke, accumulating Hamu's hatred for pirates.

After his mother was killed, he was taken care of by Meroie. He sent messages to the outside world via notes in a bottle and a wind current leading up the ocean where Luffy manages to find one. It was his hope to find Joke's crew so he could avenge his mother, even though it was a foolhardy dream as Joke was long since deceased. However, ironically, he faces a revived Joke at the mountain of the Gods while following Luffy and realizes he shouldn't take revenge but rather try to protect his village as his mother once did.

Using the treasure's wish for his mom's courage, he manages to stop Joke with the help of Luffy, Nami, and Usopp. Luffy also jokes about his name as in Namu-Hamu Melon.