Clarabelle Cow is a character created by Walt Disney in cooperation with Ub Iwerks. Clarabelle is a cow and was part of the Original Mickey Mouse cartoon cast. Her character is not to be confused with her non-anthropomorphic look-alike, Caroline Cow. She is the best friend to both Minnie Mouse and Daisy Duck, as well as the girlfriend of Horace Horsecollar. She later began dating Goofy in the late 60's.
Horace Horsecollar and Clarabelle were featured as a couple in the early shorts and the Mickey Mouse comic strip. They would often tag along with Mickey and Minnie on double dates. In 1931, Clarabelle and Horace even got engaged in the storyline "Clarabelle's Boarding House", but this development was forgotten by the end of the following storyline "The Great Orphanage Robbery". Today, their relationship is somewhat inconsistent.
In some of her more recent appearances, in addition to some comic books from the late 1960s, she's been portrayed as the girlfriend of Goofy. The two were shown as a couple in Mickey, Donald and Goofy: The Three Musketeers, Mickey Mouse Clubhouse, Mickey Mouse Works, House of Mouse and Minnie's Bow-Toons. They also appeared together along with many other Disney couples in the closing of the 1994 Walt Disney's World on Ice adaptation of Snow White and the Seven Dwarfs as well as some theme park entertainment. Goofy and Clarabelle's relationship is still somewhat strong as a picture of Clarabelle in Goofy's home for the cartoon How to Hook Up Your Home Theather. They were seen flirting with each other in the early Mickey Mouse cartoon The Band Concert.