There’s this one book I read back in elementary and I can’t remember the name and I’m like starting to think I just imagined it but like it was Lowkey dark but not too dark???

I have no clue but it was like called “Messenger of Death” or smth I can’t remember the exact name I think that’s what it was but like it’s about this girl who wakes up in some random ahh place and she finds a building and she walks in and it’s like a church and she opens the coffin and sees a teenage girl with a gun5h0t wound in the side of her head and some random ahh guy (who’s description made me believe he was an Emo twink) popped up and started showing her that girls life?? And like how she’s mentally unstable due to OCD and trauma and like bullying and then after she finds out she was the girls bully all along or sum and then I think she becomes that guys assistant??? Like he was a messenger of death and I think she became his assistant??? Ion remember 😭😭😭