Michelle Forbes' Retro Girl is revealed in 7 new photos from Powers, which also include Sharlto Copley and Susan Heyward.
The Killing star will play a District 13 solider who is second in command to Boggs in the Suzanne Collins novel.
Two new characters will be introduced on the hit AMC drama, which shoots this December.
Veena Sud will write and produce this new drama for the cable network.
AMC Network has added two more actors to the cast of this show.