Maybe a mysterious figure. This person could see great potential in Izuku and decide that UA is the place where he can fully develop his abilities. So, they use some means to force him to attend UA. It could add an air of mystery to the fanfiction story.
Perhaps an old acquaintance of his father. If Izuku's father had some connection to UA or the hero world, this acquaintance might feel obligated to ensure Izuku follows in his father's footsteps and forces him to go to UA, believing it's Izuku's destiny.
It could be his mother. She might think that UA is the best place for Izuku to become a hero and force him to go there for his own good, even if he has some doubts or hesitations.
In this kind of fanfiction, Izuku might face a lot of challenges. Maybe he is forced to go to UA by some external power or person against his will. He could struggle to adapt to the new environment at UA, having to deal with difficult classmates or strict teachers. Also, his own self - doubt might intensify as he didn't choose to be there on his own terms.
Another possibility is that he joins a different hero school. Maybe there's a smaller, more specialized school that focuses on a particular aspect of heroism that UA doesn't. For example, a school that specializes in rescue operations could be a great fit for Izuku's empathetic nature.
He might form closer bonds with local heroes in his neighborhood. Since he's not at UA, he would have more time to interact with the heroes who operate near his home. They could become his mentors or friends, guiding him in his hero journey.
There could be his friends like Ochaco Uraraka. She might be in a position where she's trying to understand Izuku's situation and help him. Maybe she tries to convince the people forcing Izuku to give him some space.
His over - enthusiastic best friend could be the one. This friend might think that Beckett is too much of a loner and decides that a fake date would be a great way to get him out of his shell.
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 the 'izuku stronger than all might fanfiction', Izuku can be stronger for several reasons. Fanfiction writers often take creative liberties. They may write that Izuku has a deeper understanding of his quirk, One For All, compared to All Might. He could also have additional abilities or support from other characters that contribute to his increased strength. Maybe he has formed alliances with powerful individuals who help him train and unlock new levels of power, enabling him to surpass All Might.
In these fanfictions, Izuku could be stronger because of his strategic thinking. He might analyze battles more carefully than All Might and use his quirk in more creative ways. Also, his experiences could be different from All Might's, leading to a different kind of strength. For instance, he may have faced tougher challenges at an earlier stage which forced him to adapt and become stronger more quickly.
In the fanfiction, Izuku may start to undermine All Might's actions. He could try to expose any flaws or wrongdoings of All Might. Their relationship goes from one of idolization and guidance to one of opposition. Izuku no longer looks up to All Might and may even try to bring him down. For example, he could spread rumors or try to find evidence against All Might if the story goes in that direction.
His friends like Ochaco could help. She might use her zero - gravity ability to assist in handling heavy parts during the construction. Also, Iida could be there to keep things organized and on schedule with his strict sense of order.