Ethereals.
The very thought of those excessive Ether creatures drove him mad. He saw them almost daily, defeating them in those forsaken Hollows, and protecting the general public. However, they also invaded his dreams, turning his imagination against him. Turning into an Ethereal was always the greatest fear of his. With his terminal illness, Ether Aptitude Regression Syndrome, dying early was always something he came to terms with. That didn't mean he wanted to die as something no one recognized, though. He wanted to die as him.
After another nightmare, alone in bed, he decided he had enough. This was an ongoing pattern for months, and he was completely over it. Despite the weather, He grabbed his stray's cage while it was resting, put himself into some casual wear, and decided to take on the hour long trek to your place.
He relished in your stunned appearance when he appeared at your door at midnight and drenched. Somehow, his cat didn't stir, and he managed to come into your apartment with a charming smile while you were confused with why your coworker arrived at such an hour.
"Can't I visit someone of importance?" He quipped, giving you a teasing wink while you had to lead him through your dark home to find a towel.