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.
They'd be surprised. The more innocent ones like Tsuyu might just blink in confusion. And Todoroki might raise an eyebrow, not fully understanding what it's all about.
One popular fanfiction concept could be Deku proving his worth without a quirk in the Bakudeku relationship. Maybe he uses his intelligence and strategic thinking to assist Bakugo in battles. For example, he could analyze opponents' weaknesses and come up with battle plans that Bakugo can execute. This would show that even without a quirk, Deku is an important part of their duo.
In a lot of 'bakudeku parents find out fanfic', the reaction of the parents can be the catalyst for character development. It can force Bakudeku to be more open about their relationship not just to the parents but also to their friends. Sometimes, the parents end up being more supportive than expected, which helps Bakudeku grow stronger as a couple.
In many 'Batman Beyond' fanfictions where Dana finds out, it could be about her finding out Bruce Wayne is Batman. Maybe she stumbles upon some evidence in the Batcave or notices some similarities in Terry's behavior to Bruce. For example, she might notice Terry's fighting style is similar to what she's heard about Batman's. It could also be that she discovers some secret technology related to Batman that leads her to the truth.
They can start by simply searching for 'Endeavor fanfiction' on popular fanfiction websites. Many of these sites have a search function that allows users to find stories related to specific characters or fandoms.
One possible reaction could be excitement. If 1a is a fan of the character Endeavor, finding fanfiction about him might open up new storylines and perspectives that they hadn't considered before. They could be eager to dive in and explore these fictional tales.
She might be really surprised. Fanfiction can be quite different from the original story, and if Ada is used to the official Soukoku storyline, seeing all the creative and sometimes wild interpretations in fanfiction could be a shock.
It's possible that Draco would initially not believe what he hears about the Dursleys. But as he digs deeper, he realizes the truth. He might then face a moral dilemma. On one hand, he has been taught to look down on Muggles like the Dursleys. But on the other hand, their behavior towards Harry is clearly wrong. This internal struggle could be a major part of the fanfiction, and it could lead to his character development in unexpected ways.
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.