Suletta Mercury originated as a repli-child cloned from Ericht Samaya, officially recorded as having a deceased father who died when she was very young. She endured an isolated childhood on Mercury, shaped by harsh conditions and bullying from local miners. Extensive training on a Mobile Suit Combat Simulator began at age four, forging exceptional piloting skills that made her Mercury's primary rescue operator by age eleven; she frequently saved lives in hazardous environments. This upbringing fostered significant social difficulties, including timidity, stuttering, and a pathological need to be useful to gain validation. Her personality centered on the motto "If you move forward you gain two, if you run you gain one," taught by her mother Prospera Mercury. This philosophy compelled decisive action during crises, especially while piloting or rescuing others. Despite social anxiety, she held strong moral convictions, intervening against bullies and defending friends like Miorine Rembran. However, dependence on Prospera's approval left her vulnerable to manipulation, prioritizing her mother's commands over personal dreams or ethics—including abandoning goals or committing violence, actions she internally struggled with and repressed fears about. Her piloting expertise focused on the Gundam Aerial, which she perceived as a sibling, communicating directly with it and its GUND-bits for precision attacks, defense, and tactical diversions. She initially operated at Permet Scores 6–7 without visible side effects, later revealed possible due to Ericht Samaya's consciousness within Aerial absorbing the data storm strain. Genetic similarities to Ericht still granted Suletta natural resistance, enabling extended operation at Permet Score 5 before physical deterioration occurred. She also piloted units like the Demi Trainer and later the Gundam Calibarn—a prototype without Permet filters described as a "monster" for its extreme risks. A major turning point occurred when sabotage by Miorine caused her to lose a duel against Guel Jeturk, forfeiting her Holder title, engagement, and Aerial. This defeat, compounded by learning her cloned origins and subsequent abandonment by Prospera and Ericht in space, triggered severe depression. Recovery began through support from Earth House and witnessing the aftermath of the Asticassia Massacre, forcing her to confront the real impact of violence she had dismissed. These events catalyzed a shift toward independence, leading her to reject Prospera's influence and adopt a revised motto: "Even if there's nothing to gain, I have to move forward." In later years, she exhibited increased maturity and introspection, though piloting-related trauma from the Plant Quetta and Quiet Zero incidents caused reluctance to engage in further conflicts. She focused on teaching and childcare, displaying strong maternal instincts toward Kiyu Lavot. Despite ongoing rehabilitation for data storm injuries sustained while piloting Calibarn, she participated in critical missions to protect Earth, demonstrating leadership and willingness for self-sacrifice. Her marriage to Miorine Rembran symbolized a stable resolution, and she continued efforts to establish schools on Mercury as part of her original dream to revitalize the planet.