Mekao

Mekao (メカオ) is an old mechanic and shipwright from G-8 who shows great pride in his work. He becomes friends with Usopp and later helps the Straw Hat Pirates escape the base. Dr. Kobato is his daughter.

In the G-8 Arc, Usopp explains to him what he saw next to the Going Merry back in Skypiea. Mekao was about to explain to him what he might of saw, but Drake pulled him away before he could do so. It is assumed that Mekao, like Franky knew that what Usopp saw was a Klabautermann. However, he was cut off by the nearby guards before he could say as much, so the revelation only took place much later during the Water 7 Arc.