Neglected op female reader x mha

Y/N Yagi was a girl who was abused by Inko and Izuku but not her father.. he took her in again and protracted the girl as well. Then she ran away after the abuse took another turn with her "friends" almost ignoring her ans pretended she does not exist at all. She then awakened something for stronger then a quirk as her rage shattered dimensions bringing a sacred gear from Dxd to her. She obtained the black dragon sacred gear