Susie Derkins, the only character with both a first and last name, is a classmate of Calvin's who lives in his neighborhood. Named for the pet beagle of Watterson's wife's family,[20] she first appeared early in the strip as a new student in Calvin's class. In contrast with Calvin, she is polite and diligent in her studies, and her imagination usually seems mild-mannered and civilized, consisting of stereotypical young girl games such as playing house or having tea parties with her stuffed animals. Her approach to these games is arguably more modern, however, some might say even cynical. Though both of them hate to admit it, Calvin and Susie have quite a bit in common. For example, Susie is shown on occasion with a stuffed rabbit dubbed "Mr. Bun," and Calvin, of course, has Hobbes. Watterson admits that Calvin and Susie have a bit of a nascent crush on each other, and that Susie is inspired by the type of women he himself finds attractive. Her relationship with Calvin, though, is frequently conflicted, and never really becomes sorted out. Their love/hate relationship is most obvious in some of the early comics involving Susie and Calvin's relationships, when some punchlines revolved around Susie and Calvin going out of their way to malign each other, followed immediately by each thinking romantic thoughts about the other.