The Art of Deception - Yandere Hazbin Hotel x Reader

(I will try to make Y/N as gender neutral as possible in this, Y/N is supposed to be Y/N and how you picture them, also disclaimer I do not own an of the characters from the show or the show itself. All I own is Y/N, some of the story plot since some parts are obviously gonna be different, any characters I add to the book, ect you get the jist.)
You, my fellow reader, are a siren. Well, thats what you assume anyway. You are some sort of sea creature demon, {btw this is NOT an OC inserted reader if you were wondering, except for the fact that the white in your eyes is black, your fingers are webbed but like only when your in water [hopefully that makes sense?] And you have a tail as though like a mermaid when in water, ect. You get the jist.} And ever since you died you've stayed in water. You never wanted to interact with the citizens, no one knows you exsist, and your in the middle of the woods. Perfect. And its not like your alone, you have Emerson, a guy you've been friends with since forever and also your late husbands best friend. And you planned to keep it that way, that is until after the war between heaven and hell where the citizens of hell finally fought back, and things go wrong from there after you took someone in and people start to slowly slip into your life. [This is all y'all are getting, sorry I'm bad at writing these lol, enjoy!]