Henzo

Henzo (ヘンゾ) is an anime only research scientist and was at first researching for the Rainbow Mist.

History
He lost his childhood friends Rapanui Pasqua, Isoka, Akibi, Rongo and Pukau due to a pirate invasion by Wetton 50 years ago, and his attack knocking the pirate captain off of the ship that was heading into the Rainbow Mist.

During the Rainbow Mist Arc, he helps propel his friends from the Rainbow Mist to the time period 50 years ago, with the help of the Straw Hat Pirates.

He rides a boat that he designed called the H-1.

Trivia

 * He is voiced by Yuichi Nagashima in the Japanese version, who would later go on to voice Brook.