So basically Zenitau get reincarnated in the world of MHA and becomes a hero and accomplishes his will.

Hizashi and his fellow UA staff members are drawn into a conflict that was spawned centuries before the era of quirks first began when a mysterious demon girl seeks to capture another one of Hizashi's friends that his co-workers are surprised he has. (Sequel to 'Hizashi Yamada vs. the zombie apocalypse') (Crossover with Demon Slayer) (Crack fic elements) (Rating pending)

Four-year-old Izumi was living the life. She was well liked, great grades, friends with even the very crass Bakugou Katsuki, but one night her mother is murdered and eaten by a demon. What happens when the current Sun Hashira saves her and trains her in the ways of the Demon Slayer Corps? (Rated M for extreme violence and gore, harsh language. You have been warned.)

Dive into the world of Demon Slayer through the eyes of a character with your name and her brother! Then watch a double crossover happen. You and Ryuko from the world of Demon Slayer to the world of My Hero Academia, while two others from the world of My Hero Academia arrive into the world of Demon Slayer! Enjoy!

After his ill-fated battle with Akaza, Rengoku Kyojuro wakes up in another world, one with quirks and new technology and very quickly a new family for him to join. The Todoroki siblings have been longing for someone to rescue them from their father for years now but never expected their savior to come in the form of a strange man who seems to know nothing about the world he is in.

Izuku is a quirkless kid in a superhuman society. He trains to become a water-breather demon slayer. He becomes a vigilante too. This is my first fanfic so..yeah I'm not experienced. Also I have a really bad habit of writing "..." so sorry

A Demon and a Goddess brought the Hero's and students of UA High School in to watch the adventures of Tanjiro and Nezuko Kamado. What are their reactions?

Izuku's dad calls him "little dragon" as a joke, but 'dragon' is an understatement. He outgrows his nickname the way one outgrows their old skin: what lies beneath is far greater, waiting for a reason to break free. Waiting for a reason to eat. (Izuku becomes a Dragon Slayer (Fairy Tail) because the author wants to make cool new DS forms. Kimetsu no Yaiba BACKGROUND characters)

Waking up and having a rather powerful Quirk? Check! Not knowing how to use it because of an injury sustained by a Villain? Also... Check... Bad luck is no stranger to Alyx Leonidus, but in this case, it took a turn for the worse. After waking up with no recollection of who he is or where he was, Alyx is seemingly thrown into the world of Quirks!