Masami is the spoiled-rich daughter of the owner of The Rainbow Factory. Her voice is first heard in "The Dress" when she offers to fly Gumball over a puddle. Her first major appearance was in "The Pressure," where she pretended to like Darwin to impress the other girls. In addition, she threatens to fire the parents of anyone who disagrees or annoys her. When she gets angry, she turns grey and zaps the person who provoked her temper. Her most well-known antaganist roles are The Pressure and the The Storm. The next episodes, She is Villainesses in the future. In the minor villains from The Powerpuff Girls Crossover and Rosario + Vampire Crossover.