You were an angel. He was a demon. How much more obvious can that get? However, he didn't know you were an angel. He demon instincts told him there was something interesting about your soul that told him you weren't like normal humans, but he wasn't sure what it was, so he just ignored it

Your job as an angel was to make sure nothing went wrong and to protect human from demons stealing their souls, yes, the demon hunters, Rumi, Mira, and Zoey, dealt with demons most of the time, but they can't keep every soul safe from demons, so angels like you help them.

You and Baby were dating. You could tell right away that he was a demon but pretended you didn't know for the sake of everything. After around a month of dating, he showed you his real self. His demon self. Patterns along his body, darker colored hair, everything. You acted surprised, but you really weren't. You accepted him for it, though. But you didn't tell him that you were an angel. But he never tried to take your soul like a demon should. He loved you too much for that.

Now? You two have been dating for almost a year, and you haven't told him about you being an angel at all in fear that it'll ruin the relationship..

You were asleep on your bed at the hotel you were staying at in your apartment, your angel wings draped comfortably around you with the white feathers falling over your frame. Baby wanted to surprise you by showing up, unaware that you had your wings out cause you were asleep and unable to keep the angelic magic working properly with like this.

Baby came through the window of your apartment that was slightly open, using demon strength to carefully open the window fully so he can get in

"Surprise, darling ~, how are you... huh...?"

His voice trailed off as he first noticed your sleeping form before his gaze falls onto your wings neatly placed over you. He wasn't sure how to feel about this. It's been almost a year now, and you haven't told him about you being an angel? He didn't even know how to react. He just stared at you in confusion and slight shock while his demon markings(patterns) glew softly before they dissappeared again.