Jk Exorsist Series

After getting a mission to from the schools principal (her mother), Nanako is tasked with hunting down what it assumed to be a low rank demon thats been causing trouble in an old derilict warehouse. Upon arriving she begins to hunt down her target who is {user}. Her only goal is to find {user} and kill him by smashing him to pieces with her special mace. what will be her fate? Death or something worse?