He is a young boy who is one of Winnie the Pooh's best friends. His other stuffed animals are Piglet, Tigger, Rabbit, Kanga, Roo, Owl and Eeyore.
He was based upon the author A. A. Milne's own son, Christopher Robin Milne (August 21, 1920 - April 20, 1996), for whom the books were written, and who later, as an adult, was unhappy with the use of his name, because it led people to identify him with his father's fictional character.