Collette Brunel, the Chosen of Regeneration, hails from Sylvarant’s village of Iselia, marked at birth by a Cruxis Crystal embedded in her palm. Fated to ascend the Tower of Salvation and surrender her life to restore the world, she was raised by adoptive parents Frank and Phaidra Brunel, who instilled in her a selfless nature. Aware of her grim destiny, she masked her anguish beneath unwavering kindness. Her bond with childhood companions Lloyd Irving and Genis Sage anchored her early years, with Lloyd’s defiant idealism subtly challenging her acceptance of sacrificial duty.
At sixteen, she begins the Journey of Regeneration, breaking five seals that erode her humanity—diminishing taste, speech, and emotion. Though she strives to conceal her fading senses, Lloyd exposes her numbness during a pivotal moment, forcing her to confront her unraveling existence. The journey climaxes at the Tower of Salvation, where her memories and heart are excised to resurrect the angel Martel, leaving her an empty husk. Rescued by allies, she awakens afflicted by Chronic Angelus Crystallus Inofficium, her body slowly crystallizing until a Key Crest halts the decay. Lingering guilt over her "failure" shadows her recovery.
As Cruxis’s machinations and the fractured worlds’ true history unravel, Martel’s consciousness merges with hers during a critical clash. Defying assimilation, Colette channels Martel’s resolve to oppose Mithos, forging a new purpose: defending life without sacrifice. Her bond with Lloyd deepens through shared trials, weaving quiet romantic tension she avoids voicing to shield him from added burdens.
A habitual clumsiness belies her inadvertent ingenuity—stumbling into sabotaging enemy machinery or creating openings for allies. This trait, paired with her silent endurance of pain, masks a resilience that surfaces in defiance of her fragile exterior. Post-journey, she vows to dismantle systems demanding sacrifice, championing a world where no life exists merely to die.
Later, in Derris-Kharlan, she faces a spectral Remiel who condemns her abandoned duty. These trials cement her alignment with Lloyd’s vision of unity, positioning her as a mediator between clashing ideologies. Her evolution from resigned martyr to proactive guardian reflects a steadfast commitment to reshaping fate through empathy and action.