One idea could be to have a hero-themed party where the characters from My Hero Academia all show up in their best hero costumes. There could be a competition for the best costume, with prizes like limited - edition hero merch. Another aspect could be a battle - royale - style game where they use their quirks in a safe, party - friendly way, like shooting small blasts of confetti instead of real power blasts.
Well, you could set the party fanfiction during a school festival at UA. The students could be responsible for different aspects of the party. For example, the food class could create hero - themed snacks and drinks. And there could be a dance - off between the different classes, with each class showing off their unique moves inspired by their quirks. Maybe Deku could do some gravity - defying jumps during his dance.
In the My Hero Academia party fanfiction, it would be cool to have an international hero party. Heroes from all over the world come to Japan for this grand event. There could be a cultural exchange of quirks and hero techniques. Some heroes might bring their own traditional music and dances, and everyone gets to learn from each other. It could also be a chance for some of the more shy characters to come out of their shells and make new friends among the international heroes.
For the romantic relationships, like Midoriya and Uraraka, you could have them share a slow dance at the party. They might be a bit shy at first, but as the music plays, they start to open up more. And the other characters could be watching and teasing them a bit in a good - natured way. Also, you can show the rivalry relationships, such as Todoroki and Bakugo, by having them compete in a quirk - based party game where they try to outdo each other in a non - destructive way.
One cool quirk idea could be 'Shadow Mimicry'. The user can blend into any shadow and move freely within the shadow realm, also being able to mimic the actions of those whose shadows they are in. It gives a lot of stealth and surprise attack possibilities in a fanfiction.
One idea could be a study session. Momo is known for her intelligence, and your OC could be struggling in a particular subject. They meet in the library, and Momo helps your OC study. It could be a cute and character - building scene. Another scene could be a battle simulation in school. They're paired together against other students, and they have to use their quirks in tandem. Your OC might have a quirk that enhances Momo's creation quirk in some way. Or a scene at a hero convention where they both attend to learn more about being heroes and get inspired by the pros there.
Maybe the new home is a large treehouse - like structure built in a forest. It would blend in with the natural surroundings and provide a peaceful yet secure place for the heroes. They could have different levels for different functions, like a training area on the lower levels and sleeping quarters on the upper levels. It could also be a place where they can study and analyze the quirks of villains and come up with counter - strategies.
Another concept is that Todoroki was turned into a vampire by a villain's quirk gone wrong. He then has to find a way to reverse it. He teams up with Midoriya, who is determined to help his friend. They search for a mysterious old hero who might know a cure, all while Todoroki battles his inner vampire nature.
One idea could be that Kakashi is somehow transported to the My Hero Academia world. He could become a teacher at UA, using his ninja skills and wisdom to train the students in new and unique ways. His Sharingan would be a very interesting power in the MHA universe.
One idea could be a story where Yui Kodai discovers a new quirk ability within herself during a tough battle. Maybe she's able to use her size - changing quirk in a completely unexpected way that turns the tide of the fight.
Well, you could include a 'Capture the Flag' game like they have at Camp Half - Blood. It would be exciting for the characters in the fanfiction. Also, for the party decorations, having floating Greek columns made of cardboard and painted to look like marble would be really cool. And don't forget about a 'prophecy - writing' station where guests can create their own prophecies, just like in the books.
One idea could be a fanfiction where Deku's quirk suddenly mutates. Instead of just having One For All, he starts to develop an additional power related to it, like the ability to share a fraction of One For All's power with his friends temporarily to boost their own quirks in a time of great need.
Another approach is to do a Halloween party at UA High. Everyone dresses up in different costumes. Deku could go as All Might in his younger days. There could be a costume contest, and some characters might use their quirks to enhance their costumes. But then, a real threat shows up disguised as a party guest, and the students have to use their wits and powers to stop the danger while still in their party get - ups.