Jemina is an eleven-year-old brown-haired superhero, always dressed in a beautiful blue long-sleeved full-body tight-fitting rubber wetsuit with wavy lines on it, a pair of light pink swimming goggles, a pair of dark blue rubber gloves, a light blue swimming cap with fish patterns on it, a blue watery superhero cape, a pair of indigo flippers and a light blue snorkel that she always keeps in her mouth. Her superhero name is 'Sensational Swimmer' and she can control water and hold her breath underwater for a very long time. She is part of a children's superhero club along with four other girls her age named Jessie, Jacqueline, Josephine and Julianna, whose superhero names are Beautiful Butterfly, Dazzling Fairy, Pretty Pink Princess and Cute Kitty, and all five girls live in a lovely house. They never take off their superhero outfits because they love being superheroes too much, meaning they wear them to bed!