Harmonic Dissonance

(This is a Hazbin Hotel fanfiction. all characters except for Sonata, Nami, and the townspeople belong to Vivzipop.)

Sonata is a well off young woman who adopts and abandoned child and raises it as her own. sonata had never sinned, wanting to set the best example for her daughter Nami. But after the abduction and brutal murder of her adopted daughter. Sonata loses all control and slaughters everyone in her home town except for families with children, after the police and community failed to help her save Nami. she is gunned down by police before she can kill the men who murdered her daughter, or has the chance to lay to rest the body of her dearly departed. swore by Lucifer that one day she would return to seek her vengeance upon the men and end their family line. while wondering around hell she comes across a demon who claims he can help her fulfill her vengeance for a price. Who is this mysterious demon and what does he have in store for Miss Sombers.