I really loved the idea of the sunglasses being a way for someone to see things others could not.
Anne glared at a woman wearing skinny jeans and a black flowing tunic top from behind her sunglasses. She could understand why everyone in the train station was staring. She was stunning, with her blue eyes and the striking contrast between her very pale skin and hair as black as a raven. It’s a pity they couldn’t see what the glasses allowed her to see, which was her true form underneath the glamour. The twisted frame, pot belly, and jagged fangs that protruded from the demon’s mouth were truly grotesque. It was stalking a little girl who was whining about the heat on the busy train platform, so Anne hurriedly pushed her way through the crowd and just as the train came into view, tripped the demon sending it tumbling in front of the train and kept on walking. Some hunters may think her nonchalance was rude, but she preferred to think of it as calculated efficiency.