The Protective Entity (A Buzzfeed Unsolved AU)

The classic AU of "demon" Shane Madej.
Shane is not a demon himself, but he is rather a medium that can see spirits, ghosts and supernatural entities that others cannot. He can feel the aura's of other's emotions and the slightest changes in the environment. He can communicate with spirits and scare them away. Demons, however are not so easily fooled. He can feel the chance of human emotion in the atmosphere and has physical reactions to it, such as pain or simple feelings throughout his body.
He spends his ghost hunting days trying to protect his human co-worker and friend, Ryan Bergara, from the real spirits around him by trying to hide it from him. However, when Ryan goes missing, it's up to Shane to find him.