The two main characters would be Izuku and All Might. Izuku is the central figure who has this special connection to All Might in the context of the fanfic. All Might, being a very important and powerful character, is the one Izuku looks up to. Their interactions and the development of their relationship are likely to be the focus of the story.
Izuku and All Might are the main characters here. Izuku, who has this 'little girl' - like admiration for All Might. This admiration will drive Izuku's actions and decisions in the fanfic. All Might, on the other hand, is the person that Izuku idolizes. Their relationship will be explored, such as how All Might might mentor Izuku or how Izuku might try to impress All Might.
Obviously, Izuku and All Might are the main characters. Izuku is the one with the relationship to All Might described in the title, and All Might is the object of Izuku's admiration as in the 'little girl' - like admiration.
There's also a possibility that the main antagonist is another student at U.A. High School. This student could be competitive and feel threatened by the girl's relationship with Izuku. They might use underhanded tactics to try and make the girl fail or lose her confidence, adding a layer of drama and conflict to the fanfic.
Well, without reading it, we can only guess. It could be that Izuku, in the context of this fanfic, has a very cute and innocent admiration for All Might similar to how a little girl would look up to her hero. Maybe it shows Izuku following All Might around, learning from him, and getting into all kinds of situations where he has to prove himself while being under All Might's wing.
Well, the plot could be about a young girl who idolizes Izuku. Maybe she's inspired by All Might's belief in Izuku and tries to follow in his footsteps. It could involve her training to be a hero, facing challenges like Izuku did, and learning valuable lessons along the way.
Well, it depends on how the author of the fanfic has characterized Figure 13. However, if the premise is that Figure 13 is a girl in this fanfic, then that's how it is within the context of that particular story. Different fanfics can have different interpretations and characterizations, but in this one, it's stated that Figure 13 of Izuku is a girl.
Definitely his friends from U.A. High. Bakugo would be an interesting character in this scenario. He might initially be annoyed but then develop a soft spot for baby Izuku. Ochaco would also be there, using her quirk in creative ways to take care of him, like floating toys to keep him entertained.
In a fanfic where All Might adopts Izuku, Izuku's life would take a different turn. He'd be part of All Might's family, which means he'd be exposed to a different way of life. All Might could teach him not just about heroics but also about life values. This would shape Izuku into a more well - rounded person. Izuku would also have a stronger support system. When it comes to his quirk, All Might could help him understand and control it better. He might even be able to use All Might's influence to get better equipment for Izuku. All in all, this adoption would enhance Izuku's story in many positive ways.
Obviously, Charlie and his little girl would be the main characters. There might also be other characters related to them, like the mother of the little girl if it's part of the story's family setting, or friends and neighbors who interact with them.
He might do it for a bet. Just like some friends might bet on who can pull off a crazy stunt, his friends could have bet him that he can't dress like a girl and act the part for a certain period.
In addition to Izuku, there could be his friends from 'My Hero Academia' who somehow get involved in the Assassin's Creed world. For example, Bakugo might end up there too and have a rivalry with Izuku in this new setting. And from the Assassin's Creed side, characters like Connor could be main characters as well, as they interact with Izuku and his friends.
In many of these fanfics, All Might also plays an important role. Since he's Izuku's mentor, he often interacts with Izuku as he discovers and hones his gamer - related powers. And Bakugo Katsuki is usually there too. His rivalry with Izuku adds an extra layer of tension and drama to the story, especially when Izuku starts to gain an edge with his gamer skills.