Susie Derkins

Susan "Susie" Derkins is a little girl who lives in Calvin's neighborhood and a recurring character. 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, and polite six-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 she allowed Susie to stay with them when she could not pick her up. And she called Calvin's Mom when Calvin dropped a huge snowball on Susie as Stupendous Man.

Oddly, although she treats school seriously, she sometimes attempts to cheat on tests.

In the winter time, Susie also builds snowmen, although they are generic and not as unusual as Calvin's.

Season 1

 * Bionic Calvin

Credits
http://calvinandhobbes.wikia.com/wiki/Susie_Derkins