Freya commands as Chief Valkyrie, renowned for her leadership and combat skill. She wields authority over the Valkyries, having elevated mortals like Sigurd to their ranks based on courage and merit. Her downfall stems from a profound sense of neglect by Odin, ruler of the Norse gods. This abandonment leaves her susceptible to the demon army's manipulation, turning her against former allies. Her betrayal proves pivotal; she strips the Valkyries of their protective rings—the source of their power—leaving them defenseless for capture.

After her own capture, Freya endures intense physical and psychological conditioning that breaks her will. She becomes subservient to demonic forces, particularly the demon Ngurlni, adopting a mindset of "Happiness in Slavery." Her corruption manifests as embracing her role as a sex slave and actively urging fellow Valkyries to surrender and submit. A slime creature induces hermaphroditism in Freya, altering her sexual characteristics to facilitate participation in the sexual exploitation of other Valkyries.

Her motivations extend beyond Odin's perceived neglect to an explicit rejection of divine duties. She renounces devotion to Odin, citing his failure to intervene during the Valkyries' subjugation. Her actions directly enable the demons' victory, resulting in the Valkyries' enslavement and the collapse of their resistance. Freya's arc concludes with complete mental and physical degradation. She stands as a symbol of irreversible corruption within the narrative, having facilitated the fall of other Valkyries while embracing her own subjugation without redemption.