"Sometimes I think books are the only friends worth having."
Susan "Susie" Derkins is a main character in Calvin and Hobbes.
Susie is a little girl who makes her home 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 (subjective), intelligent, and polite 6-year-old girl, who in many ways is a foil to Calvin. She takes her studies seriously and doesn't slack off on her homework as Calvin does. She also takes piano lessons. It has been stated 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.
Her mother must be friends, or at least cordial, with Calvin's mother; this is supported when in a story arc Susie must stay at Calvin's house when her mother could not pick her up, and she called Calvin's mother when Calvin, as Stupendous Man, dropped a huge snowball on her. Oddly, although she treats school seriously, she sometimes attempts to cheat on tests. In the wintertime, Susie also likes to build snowmen, although they are nowhere near as unusual as Calvin's. The most unique creation of hers was a snow woman, which inspired Calvin to make an anatomically correct male snowman in the front yard.
Susie is about Calvin's size, and usually wears a shirt and overalls or a shirt and pants, but sometimes, her outfit is a dress or a shirt and skirt. She is a natural brunette who has short hair.
While Susie often ignores Calvin entirely, she is attracted to Hobbes. She often hugs Hobbes or comments on how he is cute (to Hobbes' delight and Calvin's disgust). Although Hobbes does not return the love physically (as he is only a stuffed tiger to her), Susie often becomes the topic of conversation while talking with Calvin. He also wears ties and things for her, and Calvin yells at him for not mauling her when he has the chance. She has a stuffed animal of her own, a rabbit named Mr. Bun. It may be implied that this is Susie's version of Hobbes, though it has not been seen in any living form, and Hobbes once remarked that Mr. Bun seemed comatose, as he does not "come alive" as Hobbes does. Susie seems to love Hobbes, often asking to squeeze him, but then gets mad when Calvin will play pretend with his "dumb ol' tiger" but not with Mr. Bun.
Susie unwillingly sits by Calvin during lunchtime at school, but Calvin always decides to sit next to her anyway. In many situations, Calvin would talk about his lunch, portraying it as something disgusting and unappetizing. The first instance of this was when Calvin described his supposed "squid eyeball sandwich", stating that he likes to "suck out the retinas." Another example would be when he told Susie that he mashed some flies into a paste onto two pieces of bread, and called it "bug butter". Susie often tells on Calvin for being so disgusting by usually shouting out to Miss Wormwood.
The booger being takes the shape of a green booger with four legs, three eyes and antennas.
Susie's favorite food, or at least favorite lunch item, is "a swiss cheese and ketchup sandwich," as stated in the Nov. 6, 1989 cartoon. She said, "It's my very favorite, too," as a reason for not hearing about Calvin's lunch.
We don't know for sure what Susie's least favorite food is, but we know that she is constantly grossed out by what Calvin has, or claims to have brought, in his lunch.