Part of the frontline Pleisar Regiment of the Peacekeeper Military, Aeryn was a top-notch soldier and combat pilot until her encounter with Crichton and Moya rendered her, by Peacekeeper standards, "irreversibly contaminated," and ostracized her from the only family she'd ever known.

Her experience on Moya has taught her that there are other means and methods of communicating, but, like D'Argo, she still turns to combat as her primary solution to any problem Moya might face. She sees the Peacekeepers, now, through the eyes of Moya's crew, and knows them to be relentless and in many ways wrong, but there is much of Aeryn that still considers herself a traitor.