One common theme is perseverance. Midoria has to keep going despite the bullying. For example, in many fanfics, he doesn't let the mean words or actions stop him from training to be a hero.
One idea could be that Himiko Toga kidnaps Midoria because she wants to understand his power better. She might be curious about how his unique abilities work and thinks that by keeping him close, she can study him. Maybe she takes him to an abandoned building where she has set up a sort of makeshift lab to run tests on him, all while Midoria is trying to figure out a way to escape and get back to his friends.
One popular bullied Midoria fanfic could be 'Midoria's Struggle'. In this fanfic, Midoria faces bullying from his classmates who are jealous of his potential. It shows his journey of dealing with the emotional and physical abuse while still striving to be a hero.
Toga could be kidnapping Midoria out of envy. Midoria has so many friends and supporters, and his growth as a hero is remarkable. Toga, who may feel alone and misunderstood in her own villainous world, wants to take away what makes Midoria so special. So, she kidnaps him in a fit of jealousy, but Midoria's positive attitude might start to change her perspective during the captivity.
He would likely be more confident. Having the powers of the Human Torch gives him a new level of strength. So he might stand up straighter and be more assertive in his actions.
In many fanfictions, Izuku adapts by relying on his heroic spirit. He sees the similarities between his world and the Spider - Verse in terms of helping people. So he starts to work with the local heroes, like Peter Parker or Gwen Stacy. He learns from them about the different threats in the Spider - Verse and how to handle them. He also tries to incorporate his own fighting style from My Hero Academia with his new spider - based powers. For instance, he might combine his One For All power with his new spider - strength for more powerful attacks. This process of adaptation is really exciting to read about as it shows Izuku's growth in a new and different environment.
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.
Bakugo is often a key character. In many fanfictions, Bakugo's reaction to Izuku's evolving quirk can range from envy to begrudging respect. Their relationship is always a central focus, with Bakugo either trying to outdo Izuku or having to come to terms with Izuku's newfound power.
Izuku would probably be terrified at first. After all, he's been kidnapped by villains. But then, his hero - like determination would kick in. He might start looking for ways to escape or at least resist their plans.
All Might often appears. Since he was Izuku's mentor, in time travel scenarios, he might be the one Izuku turns to for advice or assistance. Another common character is Bakugo. Their complex relationship can be explored further in time travel stories, like if Izuku goes back in time, he might try to change how Bakugo treated him in the past.