Susan "Susie" Derkins is a little girl who lives in Calvin's neighborhood. She is his well-known neighbor and the only major character to have both a given name and a family name. Susie is an adorable, smart, polite and beautiful 6 year old girl. Susie takes her studies seriously and doesn't slack off on her homework like Calvin does. She also takes piano lessons. It has been said that the drawing of Susie Derkins is based on a drawing of Melissa Watterson as a little girl--hence her resemblance to Calvin's mother. Calvin once revealed that Susie eats each ingredient of her sandwich separately. Her mother must be friends, or at least cordial, with Calvin's mother, because the latter allowed Susie to stay with them when the former could not pick her up. And she called Calvin's Mom when Calv