We have been twice for breakfast. Once in 2003 when it first started and once in 2005. Ariel was not at either. I know she is not guaranteed to be there, but if she is, she will be in her white wedding gown. Each year was the same --- Aurora, Snow White, Mulan, Belle, and Jasmine.
I seen that someone replied that Cinderella was their one time and someone else replied that Ariel was there the first year in 2003. I was told that Ariel was only added last summer and that Cinderella is never at the Breakfast. So what we are told and what actually happens may be two different things.