Who is fanny crowne in brave new world?

"Lenina Crowne's friend (they have the same last name because only about ten thousand last names are in use in the World State). Fanny's role is mainly to voice the conventional values of her caste and society. Specifically, she warns Lenina that she should have more men in her life because it looks bad to concentrate on one man for too long."

Taken from sparknotes.com