In a fanfiction, Ace's own experiences and battles could be related to Luffy's metabolism. Maybe Ace has some knowledge about a special fruit or power that could enhance Luffy's metabolism. He could share this with Luffy, leading to a new adventure where Luffy tries to obtain this thing to boost his metabolism. Also, Ace's death could have an impact on Luffy's metabolism. Luffy could go into a state of shock or extreme grief that either slows down or speeds up his metabolism in an unexpected way.
Yes, One Piece: I, Roger's Son, Admiral! The protagonist of this novel, Igor, was one of the twin sons of the late Pirate King Roger. After transmigrating to the world of One Piece, he became a navy general.
Well, 'Luffy and Ace: Unbreakable Ties' is a fanfiction that I really like. It focuses on their childhood memories and how those shaped their relationship as they grew up. There's also 'Ace and Luffy's Great Escape' which is full of action. It shows their cleverness in getting out of difficult situations. 'Luffy and Ace: The True Friendship' is a must - read too. It simply and effectively shows the depth of their friendship.
In a fanfiction where Luffy meets Roger, it could be an amazing encounter. Roger might see in Luffy the same spirit of adventure and freedom that he had. He could pass on some hidden knowledge about the One Piece or give Luffy a cryptic hint about the true nature of the Grand Line. This meeting could also inspire Luffy even more, fueling his determination to become the Pirate King. It would be a moment full of emotion and significance for both characters and for the entire One Piece universe.
Well, in such a fanfiction, Luffy might gain some valuable advice from Roger. Maybe Roger could share his experiences about the One Piece and the Grand Line, which would inspire Luffy further in his journey to become the Pirate King.
Perhaps in this fanfiction, Ace, Luffy and Sabo will make Marineford a place where pirates and marines can live in harmony. They could set up some rules that both sides can abide by.
In some fanfictions, Ace's death becomes a turning point for Luffy's character development. It makes Luffy more determined and focused. Ace's legacy lives on through Luffy, and this is a common theme. Ace's values, like loyalty and protecting the weak, are also passed on to Luffy in these stories.
Their relationship started when they were young. Luffy was always chasing after Ace. At first, Ace was a bit annoyed by Luffy but gradually, they became inseparable. They had many experiences together on their small island. Later, even as Ace ventured out into the world with the Whitebeard Pirates, his connection to Luffy remained strong. He was always protective of Luffy, and this was clearly seen when he faced danger at Marineford to protect his younger brother.
One possible thing that could happen is that Roger would tell Luffy about the real origin of the Devil Fruits. Given that Roger had explored so much of the world, he might know secrets about these strange fruits that no one else does. This knowledge could give Luffy an edge in his battles and his journey. Another aspect could be that Roger shares his experiences with the ancient weapons. Luffy might then be more aware of the power and danger they pose, which could be crucial in his future adventures.