The X Factor (updating for now)

When 7-year-old Izuku Midoriya meets a girl named Kyoka Jiro, he finally has a true friend. Once he finds out he's quirkless, he's hesitant to tell her but when he is told he can still be a hero, he decides nothing can atop him. But fate had other plans. When Izuku is kidnapped and experimented on, he meets a girl with yellow eyes and a burning desire, as well as a little girl who he is tasked with taking care of and vows to prevent anyone from trying to harm as well as his new best friend. Meanwhile, with no clues to find out where he was, the heroes began giving up just like everyone else. that is, everyone but two people.

While being tested on and having his DNA quirk gene-altered, a malfunction causes the process to cancel itself, leaving Izuku's quirk gene able to rearrange itself to meet the demands of whatever he desires. His new Quirk. X factor.

Eventually, Izuku returns, but not alone. And after entering Ua, how will he react to seeing Kyoka after all this time. This is a story that will be... interesting to say the least.
art isn't mine. I will tell you when it is
I don't own any of the characters.