Master Aqua Supervivere Tenebris, Born April 10th, 1242 NE is a keybearer whoms adventures became legendary within the Malica Universe, she along with her friends and comrades reappeared in 1702 during the Colomar Outbreak, though evidence points to the Combine's involvement in her disappearance in and around 1274 NE.
Aqua shows some similarities to Kairi, which she shows by making good luck charms for her friends. She also has a devotion to her friends similar to that of Sora's, for she did everything in her power to protect Ventus from harm and even sacrificed herself to save Terra. She is also similar to Sora in that she holds a strong sense of justice and desire to do what is right. Her judgments between what is right and wrong are never misplaced, although Ventus and Terra sometimes lost sight of the right thing to do. Her personality is serious, kind, strong willed, intelligent, and responsible, as she is the most reliable of the three.
She is always worrying about Terra and Ventus, who are two of her closest friends. She has been shown to be blushing and embarrassed when Zack asks her to a date, shaking her head and arms in an attempt to compose herself. She seems rather modest, as despite becoming a master already, she still referred to herself as a trainee. The only time she referred to herself as "Master Aqua" was toward the end, when she fights the possessed Terra.
Aqua may be said to be the true hero of Birth by Sleep. She was the only one officially dubbed a Keyblade master, and unlike Ventus and Terra, she never strayed from the path of light and her actions were all selfless and intended to help her friends, and to free the worlds from sinister forces.