|Played By:||Alison Matthews|
Brenna was a subterranean worker in an power generating facility on P3R-118. She oversaw the workers, who believed the surface to be uninhabitable and the power that they generated the only way for her people to survive.
Although she was against the enslavement of the people, she was forced by Administrator Caulder to keep the secret from the others. When SG1 were brought down to the facility and their memories erased, Brenna's morales were tested. She eventually tried to help SG1 escape however was shot in the process. She survived, and returned to the through the Stargate with SG1 when the workers were told the truth.