Alice Carroll lives in Neo-Venezia on the terraformed planet Aqua, formerly Mars. Introduced at age fourteen, she stands 145 centimeters tall and has long green hair that reaches her tailbone, later gaining volume and waves, and light blue eyes. As a member of the Orange Planet company, she wears a yellow-and-white uniform that changes with the seasons: a cropped blouse with an ankle-length underdress for summer, and a cape-style top with long sleeves and grey tights for winter. Initially introverted and reserved, she often emphasizes her words with the exclamation “dekkai.” Through friendships with fellow Undines Akari Mizunashi and Aika S. Granzchesta—who affectionately calls her “Kohai-chan”—she gradually opens up. She lacks confidence in her singing at first but learns from her mentor Athena Glory to focus on enjoyment rather than perfection. Recognized for exceptional rowing skills, she is scouted by Orange Planet as a Pair apprentice. After graduating middle school, she achieves an unprecedented promotion directly from Pair to Prima, bypassing the Single rank, and earns the title “Orange Princess” (Twilight Princess). In later years, as an established Prima, she mentors younger Undines such as Anya Dostoyevskaya. She owns a cat named President Maa, Orange Planet’s mascot. Her journey spans from a gifted but isolated trainee to a respected leader who balances tradition with responsibility, embracing both her talents and the value of collaboration.