Monster High Creep Over Party Twyla Doll Mattel 2021 W/Backpack The Monster High Creep Over Party Twyla Doll by Mattel is a fashion doll designed for a girl doll featuring a purple complexion and purple hair. This doll is a part of the Monster High franchise and is ideal for a party occasion. The set includes the Twyla doll with a backpack, perfect for imaginative play and adding to a collection of Monster High dolls. With its unique design and 2021 manufacturing year, this doll is a must-have for fans of the series.