Sara Scorpion, the last pure-blooded descendant of the ancient Bernstein imperial dynasty, saw her childhood shattered by the Gielen twins, Karin and Cecil, during their assault on her home city. Escaping narrowly with her mentor Hans Buro while witnessing her family's fall, this trauma forged her path into a feared pirate knight, leading the mercenary-pirate Scorpion Corps. Her raids specifically target the aristocracy, fueled by deep-seated resentment toward their perceived corruption and decadence, a stark contrast to her own noble heritage.

Her driving motivation is reclaiming the Bernstein Sword, a powerful family heirloom and artifact granting the right to imperial rule. To find it, she captures Sylia, a knight of the Wales Tributary Alliance, trading her to Duke Blankenheim for information. This act leads to her capture by the Gielen twins, who subject her to prolonged sexual torture, including electro-stimulation and forced transformations. Throughout her captivity, Sara focuses on survival and eventual escape, displaying resilience and strategic pragmatism rather than resisting individual violations. Her relationship with Sylia evolves from antagonism to alliance through shared suffering, as both become experimental subjects permanently transformed into futanari.

Physically, Sara possesses blonde hair, cyan eyes, and a pale complexion. Her attire is practical yet revealing, reflecting her pirate identity through knee-high boots, belts, and chokers. Her large bust and confident posture underscore her commanding presence.

Her development culminates in a successful escape orchestrated with Hans and Sylia, followed by the defeat of the Gielen twins and Duke Blankenheim. Reclaiming the Bernstein Sword, she ascends to the imperial throne as empress. She establishes Sylia as her right-hand companion, jointly ruling the empire. Their former tormentors are repurposed as submissive slaves. The irreversible futanari condition imposes ongoing challenges, driving near-insatiable lust, yet she leverages this to consolidate power and enact retribution. Her journey transitions from vengeful piracy to authoritative rulership, marked by the permanent physical and psychological alterations from her ordeals.