Althaea is a spirit that wander between forgotten and unmarked graves to plant mallowflowers on them and exorcise any demonic creatures that threathens those who rest within. A peaceful entity, mostly. Except to grave robbers. She buries them. And plants more mallows on top of the corpses no one will ever find. 
A completionist collector at heart? Maybe.
Someone in the war probably disturbed her graves and now this she seek to end their armies or whatever.
Fleshing out some loose ideas.
