Francette, a knight of Balmore, joined the knighthood at 16-17 after rigorous training. Her dedication meant refusing social engagements, resulting in isolation as peers married and had children. By 27, she voiced profound regret over her rugged hands and lack of romance, fearing a solitary future. She possessed long hair, typically braided into a crown, and light-colored eyes.

Kaoru Nagase intervened, granting a red potion that rejuvenated Francette's body to its 16-year-old state while preserving her accumulated strength and combat endurance. This alleviated her fears of missing childbearing years and health risks from later pregnancies. Post-rejuvenation, Francette developed intense loyalty to Kaoru, whom she perceived as a goddess. She formally became an einherjar—a divine protector—prioritizing Kaoru's safety above all. Her combat demeanor shifted notably, often displaying a psychotic smirk during battle and exhibiting eagerness to hunt or kill.

Francette wielded Ex-Gram, a sword gifted by Kaoru with an atomically thin blade capable of cutting through virtually any material. Her fighting style turned fearsome, sometimes bordering on uncontrollable. Initially, she served as personal guard to Prince Roland of Balmore, whom she admired. They later became engaged following her elevation to Viscountess. Despite this commitment spanning at least four years, she showed minimal romantic interest in Roland, focusing instead on her duties to Kaoru. Their relationship remained childless, partly motivating her desire for rejuvenation.

Francette's personality blended kindness with fierce diligence. She was incapable of ignoring those in need when able to assist, reflecting an inherent responsibility. Her honesty extended to admitting envy toward married friends and juniors. Her rejuvenated form, combat prowess, and unwavering devotion to Kaoru defined her later actions.