Danielle is a nine-year-old underwater explorer who always wears a cream wetsuit, pink goggles, magenta gloves, a red swim cap with two cat ears, amethyst flippers, a white snorkel, maroon fairy wings and a red cat mask. She attends an all-girls underwater explorer boarding school, and she has six other classmates in her class, all of whom wear fairy wings and animal masks like she does. She's a very friendly underwater explorer too.