Has Roc's mentor ever been formally named, given details or anything of the sort other than having trained him in gunsmithing?
Oh, that guy? No. I just made him up to make the bio long enough AND explain why the heck Roc was using guns instead of other things.
EDIT 3: To be fair, I was new at the time. I suppose making a new entity as a throwaway was a bad idea in retrospect
"Suppressive fire won't." Murphy's Laws of Combat