Lady Sybil, Lady Mary & Lady Edith

Edith: Lady Edith Crawley, the middle daughter of Lord and Countess Grantham, is considered to be the least, well, marketable of the Crawley girls; her mother once even remarked that she would be taking care of them in their old age rather than having a husband and children of her own. Edith was often at odds with her eldest sister in season one; it was revealed that she was the reason Mary's tryst with the Turk became a rumor. Edith actually caught the interest of her own suitor, Sir Anthony Strallan, but Mary's  revenge was to sabotage the possibility of a proposal.