In fanfiction, if Deku gets kidnapped, his friends from U.A. High would likely launch a rescue mission. Bakugo might be especially determined, as much as he tries to hide his concern. They would use their quirks in creative ways to track Deku down.
His friends could use their various quirks to track him. For example, if there are characters with enhanced sense of smell or the ability to detect energy, they could start the search. Then, they would plan a strategic attack on the kidnappers' hideout.
He might cry a lot. Deku is very emotional, and being cheated on would be a very painful experience for him. He could also get angry, which is rare for him, but this situation would be so unjust that he might not be able to hold it in. He'd probably start to question his self - worth too, thinking that there was something wrong with him that made his partner cheat.
In kidnapped deku fanfiction, the build - up to the kidnapping is common. There are often signs or threats before it actually happens. Then, Deku's state of being while kidnapped is important. Is he injured? How is he coping? And the role of his allies is crucial. They might have to overcome obstacles and their own fears to rescue him. For example, they could face other villains or traps on their way to save Deku.
There's also 'Deku's Abduction' on Archive of Our Own. This fanfiction delves into the emotional turmoil of Deku's classmates when he is kidnapped. It shows how they each use their unique quirks to search for him, and Deku's own attempts to escape from his captors.
In many fanfictions where Gil gets kidnapped, it could be for various reasons. Maybe it's by a rival group who wants to use him as a bargaining chip against his friends. For example, in some stories, Uma's crew might be targeted because they are seen as a threat in the Isle of the Lost. Gil, being a part of that crew, gets kidnapped. Writers often use this plot device to create drama and show the loyalty and courage of the other characters as they try to rescue him.
One popular kidnapped deku fanfiction is 'Deku's Ordeal'. It focuses on how Deku gets kidnapped by a group of villains and his struggle to escape. Another is 'Kidnapped! Midoriya Izuku' which delves into the psychological impact on Deku during the kidnapping situation. There's also 'Rescuing Deku' that is more about his friends' efforts to save him.
Well, in the fanfiction, Deku might get a new look that changes how others perceive him. Maybe his friends at U.A. High are really surprised by his new haircut and it could lead to some funny or heartwarming interactions.