Well, if Izuku is hit by a love quirk in fanfiction, it could lead to some really interesting plot developments. He might completely change his focus from his hero training to the object of his new - found love. This could cause some conflict with his friends and mentors who expect him to stay on track. Also, his actions might be misinterpreted by others, leading to some comical or even tense situations.
In fanfiction, if Izuku was hit by a love quirk, he might start acting in a very affectionate way towards a particular character. For example, he could become overly protective or constantly seek the person's attention. His normal shy and reserved self might be replaced with a more forward and love - stricken version.
In a fanfiction where Deku is hit with a truth quirk, there are many possibilities. Firstly, his interactions with his mentors like All Might would become very different. He might admit his doubts about being a worthy successor, which could either strengthen or strain their relationship. Secondly, his classmates would be shocked by some of the things he reveals. For instance, if he tells them how much pressure he feels to be the best. This could lead to more understanding and support among them, or it could create some jealousy and rivalry depending on how the other characters react. Lastly, Deku's own view of himself would change as he has to face his unfiltered thoughts and feelings.
Well, in such a fanfiction, Aizawa might suddenly age rapidly. His physical appearance would change, with wrinkles and grey hair appearing. His once-sharp reflexes could be dulled due to the aging of his body. This could put him in a vulnerable position, especially in a world full of villains. And his relationship with his students might also change. They might start to see him more as a frail old man rather than their strong teacher.
Well, if Izuku had a quirk in a fanfiction, he might be an even more formidable hero. He could have a quirk that combines elements of his original quirkless determination and a newfound power. For example, maybe he has a quirk that allows him to enhance the quirks of those around him while also having his own unique ability, like super strength. This would change the dynamic of his relationships with his classmates. He wouldn't be the underdog in the same way, and might take on a leadership role more quickly.
Some characters might be immediately terrified. They could avoid Izuku or even try to drive him away. For example, classmates who don't understand his quirk might spread rumors about him.
Well, if Izuku gets the Hero Killer's quirk in fanfiction, he might face a lot of internal conflict. On one hand, his original goal of being a hero is all about saving people with a smile. But the Hero Killer's quirk is more about punishing those who are 'false heroes'. Izuku would have to struggle with how to use this new power in a way that aligns with his values. Maybe he'd try to reform the quirk's nature, using it to expose real villains who are hiding among the heroes instead of attacking heroes directly.
He might lose his control over his own quirk for a while. Since his quirk is erasing others' quirks, if he's hit by a strange quirk, it could disrupt his own quirk's function.
His relationships with his friends would likely become more complex. If he starts using his time quirk to change things, his friends might not remember the original timeline, but Izuku would. This could create a sense of isolation for him as he holds memories that no one else does.
He might start blushing more often and be unable to look the person he loves in the eye without getting flustered. Izuku could also become more clumsy around them, tripping over his own feet or dropping things.
The Gamer Quirk also changes Izuku's relationship with others. He can now offer unique insights based on his quirk. For instance, he might be able to analyze a villain's attack pattern like it was a boss fight in a game. His friends and allies can then use this information to their advantage. This makes him a valuable member of any team. At the same time, it also means that he might be seen as a bit of an oddball because his thinking is so different from the norm. But overall, it helps him form deeper connections with those who understand and appreciate his quirk.
There are also fanfictions where Izuku's quirk has a hidden aspect. Maybe his connection to One For All unlocks memories or abilities from the previous users in a more profound way. For instance, he might be able to access the combat knowledge of the past users directly, almost like having an in - built combat instructor guiding his every move.