Hello again!
We have some details about Gale's role in the short movie "Thirst"!
This is what was posted on the official Twitter:

"Because so many are asking, here's s snippet about GaleHarold's role: “Guy”: intense, handsome, and 'normal' in Billy's eyes...His handsome face, suit and loosened tie don’t belong in a place like this. He’s a few years and many drinks ahead of Billy."

Thanks to Klaudia62!