Kamyu's Band

Kamyu's led a group of con men who visited village to village in Arabasta in order to get free food while posing as Rebel Army. They only appeared in the anime, and made their debut in Episode 99.

Arabasta Arc
The false rebels are first seen in Ido enjoying free food from the citizens, making them believe that the band is part of the real Rebel Army and will protect them from bandits. When the Straw Hat Pirates with Ace and Vivi arrive at Ido, they discover that the con artists' scheme, and after a little discussion, decide to turn the four fakers into real heroes. Luffy and his comrades attacked them, then they ran away pretending like cowards, "proving" to the villagers that Kamyu and his friends are hero. Thanks to them, Kamyu and his friends learn the importance of being a hero.