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.
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 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.
His relationship with his mother could become more complex. She might be worried about his new nature and try to protect him more. With his friends, like Bakugo, they might initially be scared or distrustful when they find out about his quirk.
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 his teachers could also change. The teachers might be more interested in studying his sentient quirk, which could lead to special training or extra attention. This could either make Izuku feel special or pressured, depending on how the author writes it.
On the other hand, his Gamer Quirk can also bring him closer to some characters. If there are other characters who are also into gaming or understand the concept of leveling up, they might bond with Midoriya over it. For instance, he could form a closer friendship with a character who also has a quirk that has some game - like elements. They could exchange tips on how to better use their quirks.
His relationship with Bakugo would be very different. Instead of Bakugo looking down on Izuku for being quirkless, he might be jealous of Izuku's powerful fire quirk. This could lead to even more intense rivalries between them. With All Might, All Might might be more cautious in training Izuku as a fire quirk could be more dangerous to handle without proper control.