[ Of course the asshole had to go and say his name, but that's fine. He can work with it — he only has to keep up the act long enough to make it out of this room. Arthur's words from just moments earlier spring to mind:

If I absolutely have to, I can shoot blind. Hard to miss point blank.

Let's try to avoid that. His expression twists into the most Patented Steve Harrington Expression of Vague Confusion and Disbelief that he can muster, and he hopes it comes across in his tone. ]

I don't know, man! Who the hell is Billy? [ Honestly he's never been more grateful to have such a generic name. Billy is a little easier to play off as some random accusation than, say, Pickles. ] I promise, I — I have no idea what he's talking about.

[ He pauses, seems to draw in a breath to steady himself. ] I can talk to... to what's-his-name, Bash, if that'll help.