when otama know that ace is luffy's brother

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.

Ace would probably be angry at first. He doesn't want Luffy getting involved with such a dangerous person like Blackbeard.

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.

Whitebeard is another character that could be important in these fanfictions. As Ace's adoptive father, he plays a significant role in Ace's life. Fanfictions might explore how Whitebeard's influence on Ace affects his relationship with Luffy, like how Whitebeard's values of family are passed on to Ace and then reflected in how he treats Luffy.

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 great 'Ace Protective of Luffy' fanfiction is 'The Unbreakable Bond'. In this fic, Ace is always on high alert to protect Luffy from any threats in the New World. He uses his fire powers in really creative ways to fend off enemies.

Yes, there are quite a few. Some might focus on female Luffy's adventures alongside Ace in the One Piece world, exploring their unique bond and how they support each other in the face of challenges. These fanfictions can offer new perspectives on the characters and their relationships.

Well, one characteristic could be the focus on a more 'romantic' or 'intimate' relationship between Luffy and Ace, which is often not in line with the original platonic nature of their bond in the source material. However, this is a very controversial aspect as it goes against the typical portrayal of their brotherly relationship.