Yuuei's resident Zombie girl

Sacrifice was what made the hero, not a title or fame or even recognition from the world. That was the way she viewed it. Because if you gave your all to save someone else, even if you died in the end, you were a hero. So after doing so, and giving the highest anyone ever could, how come she was still here? How would the world react to one who gave it all, and was allowed to stay?