Manaria Sousse is the first crown princess of the kingdom of Sousse. She is a distant relative of Claire. She is the world's first confirmed quad-caster who possesses the highest aptitude in every element.
SpoilerManaria was Claire's first love, although she was first mistaken for a boy, and helped Claire overcome the trauma of losing her mother. They grew close after this incident and would continue writing to each other for years to come.