The class 1a's reaction would depend on each character's personality. Mineta might make some inappropriate comments which would be quickly shut down by the others. Iida, on the other hand, might see Deku's singing as a form of self - expression and a break from the usual hero training stress. Momo might be thinking about how to organize a proper singing event for Deku in the future so that the whole class can enjoy his talent more formally.
Some might be skeptical at first. But as Deku continues singing, they would gradually start to enjoy it. For example, Todoroki might be a bit cold - shouldered initially but then get into the rhythm. The whole class would probably end up having a great time listening to Deku.
They could be super excited. His singing might be really inspiring and make them feel more united as a class.
Well, some might be really amazed. They could see a new side of Deku that they never knew before. His singing might show a different level of confidence or a hidden talent, so they would probably cheer him on.
The girl herself would likely be very embarrassed. She might turn red in the face and try to act like it didn't happen. Some classmates might giggle or laugh, especially the younger students. Others might be more understanding and not react at all, or they might even try to comfort the girl if they see how embarrassed she is.
The reactions of pro heroes to Deku fanfiction could vary greatly. Pro heroes who are more outgoing and friendly, like Mirio, might actively seek out Deku fanfiction just for fun. He could be the type to laugh out loud at the creative and sometimes wacky ideas in the fanfiction. However, more serious pro heroes, such as Aizawa, might initially be skeptical about the whole concept of fanfiction. But if the fanfiction has some deep insights into Deku's character and his journey, Aizawa might start to respect it more.
In a fanfiction that gives them new powers or abilities, most of class 1a would be intrigued. Sero might be immediately thinking of how to use those new powers in combat. However, if the new powers are too outlandish or don't fit their characters at all, there could be some pushback. Jiro might be critical and say that it doesn't make sense for her character to have such a random power that has no connection to her music - based quirk.
One possible reaction could be shock from the other students. They know Snape as a strict and often unfriendly professor, and Harry calling him 'dad' would be completely unexpected.
In the 'bnha reacts to villain deku fanfiction', different characters would have diverse reactions. Uraraka would likely be heartbroken. She has always seen Deku as a source of inspiration and a good friend. So, seeing him as a villain would shatter that image for her. The teachers, like Aizawa, would be concerned about how the situation came to be. They would probably start to question their own teaching methods and the environment that led Deku to become a villain.
He could be surprised. Maybe there are aspects of Deku's past in the fanfic that Aizawa wasn't fully aware of. This new knowledge might make him view Deku in a slightly different light, perhaps with more understanding of his motives and fears. It could also make him more determined to support Deku in the future, both in the fanfic's storyline and in his own mental image of Deku.
There are also those who react with creativity. SCP fanfiction can inspire people to create their own stories, art or interpretations. They might see the concepts in the fanfiction and be inspired to expand on them, like creating new SCP - like entities or writing new plotlines related to the existing ones.
Adrien could be so amazed that he freezes for a moment. Then, he might compliment Marinette on her singing. This could lead to a deeper conversation between them, as he asks her about why she was singing and if she has any other hidden talents.
Surprise. They might be surprised to see how fans imagine different scenarios for them. For example, a character from a magical girl anime might be shocked to find a fanfiction where she's suddenly a detective in a noir - style story.