Buster Baxter is Arthur's best friend. He is generally happy and creative, with a good sense of humor. He is a white rabbit who wears a turquoise long-sleeve shirt and dark jeans. He is eight years old. He has asthma. He is also obsessed with aliens. Unlike Arthur, Buster doesn't like to read and doesn't do very well in school because he is more interested in telling jokes. He loves eating. He is the only child to a mother who got a divorce when Buster was younger. Like Arthur, Buster's favorite show is Bionic Bunny. He also plays softball. He was spun off into Postcards From Buster.