Thirty years ago, Marco was among the Whitebeard Pirates when they arrived for the first time at Wano Country. He was 15 years old at that time and was an apprentice on the ship.
At an unknown point in his earlier pirate days, Kaido started apprenticing in the fabled Rocks Pirates, which also counted Charlotte Linlin and Edward Newgate among its ranks.
Shanks and Buggy were just apprentices at the Oro Jackson of the Roger Pirates.
That got me thinking why should the Straw Hats not get an apprentice too.
The crew is filled with strong, good people, who could very well nurture a young talent, and with that not only gaining a new strong combatant but also leaving a legacy to the future.
What would be of the One Piece if Roger hadn’t taught Shanks? We wouldn’t have Luffy.
Now, we may have some candidates to be new member of the crew as an apprentice: Tama, who gets along with Luffy, has a useful devil fruit and is being well portrayed.
Furthermore when Ace visited Wano, Tama formed a bond with and had faith in him. Tama wanted to go out to sea with Ace, but he told her that she was too young at the time. He promised that he would take her with him if she became a kunoichi by the time he returned and Tama waited for him since.
What if Luffy keeps Ace’s promise and takes O-Tama with him?