When Marnie was two years old she moved with her family to the Marsh House in the seaside town of Kissakibetsu. She was often mistreated by her nanny, Georgina Gordon and the maids, Ursula and Ella while her parents were traveling. Eventually, she met a man named Kazuhiko. Kazuhiko and Marnie spent a lot of time together, often sneaking out.Marnie has long, blonde hair that falls over her back, ending is smooth ringlets. She wears her hair loose for most of her screen time, wearing a blue dress.