A popular pick by fans is Shanks as many suggested the red-hair pirate seduced Makino on a trip through the East Blue after Luffy sailed off on his own adventure.

Source: https://comicbook.com/anime/news/one-piece-theory-makino-baby-benn/

Generally, side characters and Devil Fruits introduced during 's East Blue Saga become fairly irrelevant by the later events of the series.

Source: https://www.cbr.com/one-piece-powerful-devil-fruits-ranked/

He's also highly grateful to Luffy for defeating the evil Arlong, whom Jinbe had wrongly freed from prison despite Arlong committing horrible crimes in the East Blue.

Source: https://www.cbr.com/one-piece-jinbe-most-important-straw-hat-to-luffy/

He was considered the strongest pirate in the East Blue Saga at that time and had taken over Nami's village for years.

Source: https://www.cbr.com/one-piece-every-saga-mvp/

Running for eight episodes that will be around one hour each, this new series will be tackling the events of the East Blue saga from Eiichiro Oda's original manga that saw Monkey D. Luffy gathering the first members of the Straw Hat crew.

Source: https://comicbook.com/anime/news/one-piece-netflix-cast-straw-hats-posters/

Set to arrive on August 31st with eight episodes that will follow the formation of the Straw Hats during the East Blue Saga, creator Eiichiro Oda has been acting as an Executive Producer on the project.

Source: https://comicbook.com/anime/news/one-piece-star-netflix-tv-show-hype-photo/