In certain fanfictions, the izuku system is a secret. This secrecy can strain his relationships as he has to constantly lie or be evasive about his sudden improvements. But when the truth comes out, it can either lead to a huge rift or a deeper understanding among his friends, depending on how the writer chooses to portray it.
In a fanfiction where Izuku's system quirk is very powerful, it could lead to some characters feeling inferior. However, his closer friends like Ochaco or Iida might see it as an opportunity for all of them to grow. They could train with Izuku to better understand his quirk and improve their own skills. On the other hand, villains would likely target him more, which could put a strain on his relationships as he tries to protect those around him from the danger his quirk attracts.
When Izuku has a mythical quirk in fanfiction, say a power to transform into mythical creatures, it can change how others perceive him. His classmates might be in awe or a bit scared at first. But as time goes on, they would learn to work with his new abilities. His relationship with his teachers also changes as they have to figure out how to train him to control this unique quirk.
Well, in some fanfictions, Izuku's transmutation quirk makes his friends view him as more of a valuable asset. For example, if he can transmute materials to create useful items, his friends might rely on him more for supplies during missions. This can strengthen their bonds as they trust him with important tasks.
Well, if Izuku has a chain quirk in fanfiction, it can strengthen his relationships. For instance, he might use his chains to rescue a friend in danger, which would deepen their bond. The chains could be a physical representation of his loyalty and commitment to his friends.
It might make him more hesitant to form close relationships with adult characters. He may be guarded and not open up easily to them.
His relationship with All Might could also be affected. All Might might see Izuku as an even more special student. Izuku's healing ability could be something that All Might didn't expect, and it could make All Might even more proud of him. Also, Izuku could use his healing to help All Might with any lingering injuries from his hero days, strengthening their bond.
His relationship with his sensei, like Kakashi, could become more complex. Kakashi would feel guilty for not being able to protect Naruto from the experiments. And Naruto might start to question Kakashi's ability to keep him safe. This could lead to a strain in their relationship at first, but later they could grow closer as Kakashi helps Naruto recover from the trauma of the experiments.
In fanfiction, Izuku's growth spurt can have a complex effect on his relationships. Physically, he may be seen as more of an equal by some characters who previously thought of him as the underdog. Emotionally, if he becomes more self - assured due to the growth spurt, he could start to assert himself more in group situations. This could cause some friction at first, especially with those who are used to the old, more timid Izuku. But over time, it could lead to more mature and balanced relationships as everyone adjusts to the new Izuku.
In fanfiction, Izuku's pride quirk could make his relationships more complex. If his quirk is related to personal pride, he might be more self - focused at times, which could cause some friction with his friends. For example, he might be so determined to prove his pride in his quirk that he doesn't listen to their advice.
With the teachers, like Dumbledore, he might be treated differently. Dumbledore might see this transformation as an opportunity for Harry to learn new things about the wizarding world from a different perspective. And some of the more traditional teachers might have different expectations of Harry's behavior in class now that he is a girl.