 Why can't the square-built man defend Trella against the men attacking her?
Trella feared she was in for trouble even before Motwick's head dropped forward on his arms in a drunken stupor. Trella swung with her whole body, and slapped him so hard he nearly fell from his chair. Her protector was obviously unwilling, but the dark man, faced with his massiveness, took no chances. The dark man moved in on Trella again as Kregg overtook his quarry and swung a huge fist like a sledgehammer. The dark man, who had grabbed Trella's arm, released her and ran for the door. Trella ran to the unconscious Motwick's side. He followed Trella out the door of the Golden Satellite and fell in step beside her.
 His programming does not allow it
 His programming does not allow it  He is a strict pacifist  He is full of cowardice  He is secretly collaborating with Trella's attackers