There are background characters and then there are background characters. Danz Borin is so background that virtually no clear pictures exist of him and he is partially obscured by other Cantina aliens in the pictures that do exist.
What we do know of Danz is that he worked as a bounty hunter and wore a spacesuit. He had his eye on Han Solo (not in a romantic way!) but in a using Solo for prize money way.
A potentially fascinating character who could easily have joined the other bounty hunters in The Empire Strikes Back.
Character cool factor: 7
Most likely to: have his helmet on even when drinking
Least likely to: be become more of a fan favourite than Boba Fett