Castiel understood the natural aging of humans— they’re mortals after all. He found the vessel, Jimmy, to walk the Earth, but overtime, it seemed the vessel also started to age. Little by little, the features on his face began to change, the stubble on his jaw peeking, faint wrinkles around his eyes, and then there’s the once to be dark hair, fading in color.
It didn’t really concern him the Jimmy has been advancing, until he was found looking at his reflection in the motel’s mirror, strange. His blue eyes flickered between each of his facial features, his head tilting to the side at a fifty-degree angle, just slightly.
“I’m afraid the vessel is getting old” He acknowledged with flat, gravely tone— not that he cared, just pointing it out. He looked at you through the mirror, following your form as you walked into the room.