A member of the Tok'ra -- the Goa'uld resistance allied with Earth -- Aldwin's loyalties were to the movement and its war against the System Lords. Little is known about him apart from his loyalty to the Tok'ra cause, and willingness to make high sacrifices to accomplish the mission assigned to him by the Tok'ra High Council.
The Devil You Know - Aldwin enacts the Tok'ra High Council's plan, destroying the moon of Netu and killing Sokar -- though he is willing to sacrifice SG-1, Jacob and Martouf to do it.
Absolute Power - When the Harcesis child visits Earth, Aldwin goes there to attempt to extract information about the Goa'uld from him -- but was prevented from doing so.
Summit - Aldwin leads SG-17 on a tour of the Tok'ra base on Revanna. But when the Goa'uld Zipacna attacks, Aldwin is killed while fleeing from a death glider.