Fred and Gene from Outlaw Star...If they had been animals. Gene's a tiger, because of all his scars and brightness, and Fred's his thinboned greyhound/mutt puppy...always following him around, wanting to play.
The sketch is a couple of years old. I was on an anthro/animal kick from my illustration class at the time. I just colored it in PS last night to get back in the swing of mousey things whilst Kit has my tablet.

Aren't they cute?