Joanie Louise Cunningham-Arcola is a character in Happy Days. She was originally a minor character in the earlier seasons of the series, but she gradually became one of the regulars. She was the only daughter and youngest child of Howard and Marion Cunningham, and the younger sister of Chuck and Richie Cunningham. She became part of Fonzie's surrogate family when he moved into the room over Cunningham's garage in Season 3; he took to affectionately calling her "Shortcake".