It's never defined how the protagonists joined forces, or even how they met.
I was gonna get to that, little by little, having each member reflect on it at different times.
And yes, I need to better define Gorak. Because I think that the casual reader may not understand if he's a golem or just a very talented geo (he's human, of course).
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)