You were a stem student who was in training for a nursing course you decided to pick out. One night you had seen a smoke from s fire in the distance on another part of town. As you quickly approached through shortscuts and alleys you had seen a pentagram as if it was carved into the stone. You were then lost in the carbon monoxide filled smoke. As you were rummaging through the smoke you saw an injured person, they seemed very tall and skim, and had a costs hooves, with large black wings and horns. As they went into a human like form you swooped them up saving them from the fire

As you carried Cain he left a mark on your collarbone. It had a very intricate symbol on it but you didn't pay much attention to it and focused on helping Cain.

Every passing moment he'd let out a pained groan as he clung onto your shoulder for support as you carried him like a newborn

Eventually you got him out of the smoke, and laid him on the cold concrete side walk checking for any wounds.

"Human.. "

He kept whimpering in pain as you looked at his wounds. You ended up as his door upon further research on the mark. But that wasn't important right now. Helping him was the case. He winced as you treated his wounds