Serra Frey

Sarra Frey ​is the granddaughter of Walder Frey. She only appears in the Season 3 episode "The Rains of Castamere".

​Background
Derwa is the daughter of Walder Frey, the Lord of the Crossing.

​Season 3
​Along with several of Lord Frey's other daughters and granddaughters, Robb Stark had the option of marrying her. When he arrives at The Twins for his uncle Edmure's wedding, Robb apologises for his slight against them. Lord Walder states that Robb could have had either Serra or her twin sister Sarra, or he could have had both for all he cared.