Edlyn is Lady Celia Hardy's daughter by her first husband, Ser Martyn and now adopted into the Hardy family as part of the marriage settlement.  For some years she had been with her grandparents in the Vale of Arryn for her mother insisted that Edlyn was delicate, and the northern clime would be too harsh for her constitution.  Three months earlier, however, Lady Tollet's health had worsened, and Edlyn had been dispatched to Holdfast, only to fall ill with a violent cold almost as soon as she arrived.  Since then, her mother ensured that she kept to her own room with her Septa, a Southern woman who clearly thought herself too good for the rude Northerners but now Edlyn, who thoroughly dislikes the North in general and Holdfast in particular, is beginning to get to know her cousins.

The casting for Edlyn is Emilia Fox.