Suletta Mercury is the protagonist of Mobile Suit Gundam: The Witch from Mercury. In Ad Stella 122, the 16-year-old transfers from Mercury to Asticassia School of Technology, bringing her Gundam Aerial equipped with forbidden GUND Format technology. She pilots it in duels to prove her worth, encountering Miorine Rembran and engaging in academy rivalries. Physically, she has curly red hair, brown skin, blue-green eyes, and is notably tall with large hands. Despite a gentle demeanor, she shows resilience, apologizing to opponents like Guel Jeturk after victories and enduring harsh words without breaking. Suletta fearlessly pilots dangerous suits like Caliburn to protect loved ones, highlighting her determination.