Saving not only a person's life, but also their heart...that's what I think it means to be a real hero. Nana Shimura was the seventh inheritor of One For All. She was an idealistic woman greatly admired by All Might, who she chose to inherit her power. She was killed by All For One, leaving behind a son she had given to a foster family after the death of her husband. This son presumably fathered Tomura Shigaraki (birth name Tenko Shimura), her grandson.