"i don't care who you are," he was saying to the black coated man in a low, hard voice, spittle flying, "i won't take more of a risk without a command direct from the lips of-"

Abruptly the pair became aware of Bertome and Weiroman's mouth snapped shut. He glared as though he wanted to kill Bertome...With a small shock Bertome realised the man [Gedwyn] also wanted to strike him dead on the spot.

that sounds pretty damning. Gedwyn is a known DF and it certainly sounds as though he's relaying orders to Weiramon who will only obey if they come from an unknown person. Probably a Forsaken, as i doubt he's ever been in contact with Taim.

most likely he was originally under be'lal's command. Forsaken who were probably in contact with be'lal were mesaana and ishamael, so now i think that weiramon is under moridin's command