Mona is a high school cheerleader from Diamond City who also works as one of Wario's employees at WarioWare, Inc. Besides that, she also has numerous other jobs which keep her very busy, but despite this she still finds enough time to take care of her many pets, spend time with Wario and his friends and practice her Rock 'n' Roll skills. At the end of WarioWare, Inc.: Mega Microgame$!, Wario wouldn't pay her or any of his employees when he ran out with the money.