Darkness came into the room, accompanying Dark.
The first one hurried up to the much more comfortable bed, climbing on it and settling to lick it’s paws.
The latter took his time making it to his own darker chaise, standing before the full body mirror, which emanated light.

He did not sit like his reflection had, he stood there, watching the man on the other side of the mirror. His gaze examined the reflection, the sleeping face (Had he drifted off waiting for him?), carefully trying to spot any differences. There were none.
They were identical, Light and Dark, yet so different. One could not be without the other, yet not once had they truly met in person.