Well, Gwaine is a very open - minded and loyal character. If he finds out about Merlin's magic in fanfiction, he might see it as just another part of Merlin that makes him special. He could joke about it at first, like 'So that's how you always get us out of trouble, Merlin!' and then support Merlin wholeheartedly, perhaps even trying to learn a bit about magic himself.
In some fanfictions, Gwaine might be initially shocked. But given his loyalty to Merlin, he would probably keep the secret. He could also become an ally in Merlin's magical endeavors, using his fighting skills to protect Merlin when his magic is revealed to more dangerous foes.
Often, Gwaine reacts with acceptance. He's not the type to shun Merlin just because of his magic. Instead, he'll likely embrace it as part of who Merlin is. He could say something like 'Merlin, your magic doesn't change a thing between us. You're still my friend.'
In fanfiction, if Uther finds out Merlin has magic, it could lead to Merlin's immediate arrest. Uther is known for his extreme hatred of magic in the Merlin series. He might see Merlin as a great threat and try to execute him, just as he has done with other magic - users.
In some fanfictions, if Harry finds Merlin's wand, it could potentially give him an extraordinary boost in magic power. Maybe he'd be able to perform spells that are far beyond his normal capabilities. For example, he might be able to control time or space like Merlin was rumored to do.
For Merlin, there are both good and bad consequences. On the bad side, some of the more traditional and anti - magic people in Camelot might try to oppose him. However, since Arthur now knows, he has a powerful ally. Arthur can protect Merlin from those who would do him harm. Also, Merlin can now be more open about using his magic for the good of Camelot, which is a positive change.
It would likely become very strained. Arthur has been brought up to uphold his father's anti - magic stance. So, when Uther discovers Merlin's magic, Arthur might initially feel betrayed and distance himself from Merlin.
They might be really shocked at first. Some might find it a bit strange or unexpected, especially Bakugo and Deku themselves. They could end up blushing or getting really embarrassed.
If Zeus were to find out about mal fanfiction, it would be a rather strange encounter of the ancient and the modern. Zeus, being a god in Greek mythology, is used to a certain kind of reverence in the stories told about him. Fanfiction often takes creative liberties and can deviate greatly from the original mythology. If the mal fanfiction makes him look weak or immoral, he might first try to understand this new form of storytelling. But if he feels it's an unjust slander of his character, he could try to find a way to put an end to it. Maybe he'd try to influence the minds of the writers to stop creating such unflattering stories about him. However, since he exists in the realm of mythology and fanfiction is a product of the human imagination in the modern world, it's a very odd scenario to consider.
If Jackson finds out about the nogitsune fanfiction, it could have different outcomes. For one, if he is a big fan of the original story that the nogitsune is from, he might be excited to see new takes on it. However, if he has a more conservative view of the source material, he might not like how the fanfiction is changing or adding to the lore. He may also feel a bit protective of the original story and characters, and think the fanfiction is distorting them.
Arthur could also feel betrayed. He has trusted Merlin completely, and finding out about his magic might make him think that Merlin has been hiding something huge from him all this time. However, depending on how the fanfiction is written, he might eventually come to understand Merlin's reasons for secrecy.
If everyone found out about Harry's past in fanfiction, there would be a mix of reactions. Some people would probably pity him more, knowing the hardships he had faced before. But others, especially those who were jealous of his fame, might spread rumors or distort the facts. This could also have an impact on how the wizarding community views Dumbledore, as he had been a big part of Harry's past and his decisions related to it.