(Y/n) Ichinose

(Y/n) Ichinose is a 15 year old girl and Guren's little, who joins the JIDA to get revenge on the vampires for taking away everything from her. She joins the Shinoa squad where she makes friends, but (Y/n) has a demon with a special power, and can easily take control, she has been fighting this demon almost her whole life. What if one day the demon wins this battle that has been going on for many years to come? Will she turn into a demon?