Deadpool by Skottie Young Vol. 3: Weasel Goes to Hell

On the night of her father's funeral Anniver discovers the supernatural when she is attacked by a unique creature known as a Grim, which is created from a person's mind when mourning. Now Anniver must help Insignia, a magic wielding paranormal detective agency, solve the mystery of these creatures. What are they? What do they want? More importantly can the town be protected, or will the past drag everyone down?

Disclaimer: The story has themes involving death those who are uncomfortable with this theme are considered warned.