Aquaria, as all other Atlanteans, appears as an anthropomorphic fish, sporting fins growing out from her back and arms. Her skin color is a predominant shade of light blue. She wears a darker blue dress and golden tiara with a purple gem in the center.

Unlike her late husband, Aquaria takes her royal duties very seriously. She has no interest in involving herself with the problems of the surface world, and so she keeps herself as a workaholic, focused on the benefit of her people and kingdom.