Lillian by Melyssa Moya - A Captivating Ebook Cover

I want to create a cover for an ebook called Lillian, written by Melyssa Moya. I want a cover with catholic and demonic elements. The theme of the book is a romance between a demon and a nun. I want it to have realistic elements, not cartoonish and to have an aura of mystery. The man has blond hair, white skin and blue eyes and the female has black hair, green eyes and white skin.