Hatchan

Hatchan (はっちゃん, Hacchan, called "Hachi" by most characters) is an octopus fish-man. Hatchan is not very bright but a skilled swordsman, using rokutōryū ("six sword style"). He fights with Zoro during the Arlong arc. Despite Zoro suffering a fever and severe blood loss from his unhealed wounds (which he got earlier fighting Mihawk), Hatchan is still defeated by him. Later in the manga (in a title page arc that was never animated), Hatchan goes on many adventures, which end up in him opening a floating takoyaki restaurant and meeting again with the Straw Hat Pirates. Along with Camie, he is one of the main characters of the current Sabaody Archipelago arc.

Hatchan's name is quite strange. In the Japanese language, chan is a diminutive suffix, added to the end of someone's name, giving it the meaning of "cute" or "little". However, Hatchan insists that his name is Hatchan and that Hachi is just a nickname. When questioned on this, Oda replied that the chan is the same as the last name of "Chan" common in Chinese, rather than the suffix -chan. [1]