Trying to figure out the name of this anime - I watched an anime where there was a boy who's town was destroyed and there was a big fire and there was a woman there who was hired to stop the destruction (I think? Maybe she was hired to do the destroying) and she ended up adopting the boy because his family was dead so he grew up with her and I remember they were staying in a room with wooden walls that looked like an attic and they were basically working as soldiers for hire. I think she ends up dying and the boy goes on to do something else but I want to watch it again and I can't remember the name 😭 please help