CAUTION!

9 Year Old Quirkless Girl Izuka Midoriya is kidnapped by villains and held captive for a year. Saved by All-Might, Izuka is discovered to have a Quirk that gives her the power of a Phoenix, including returning to life after being killed. With All-Might and the U.A Teachers guiding her, Izuka will become not just the Symbol of Peace, but the first Immortal Hero!

Copyrighted from Phoenixizuka from AO3