Ai Hoshino is a teenage girl with gradient-colored eyes from purple to pink and a six-pointed star in each of her eyes. She is shown to have blue-purplish hair. Ai had an abusive past, yet she has a bubbly personality. Ai had twins, Aqua and Ruby. Aqua is a smart, quiet, and introverted male baby, while Ruby is a loud and extroverted female baby. Both twins have blonde hair. Aqua has blue eyes and Ruby has pink eyes. Ai tries to keep her identity a secret around her babies, whom she loves.