Roslin is the 19-year-old daughter of Lord Walder Frey, Lord of the Crossing. She was intended to marry King Robb Stark as part of alliance between her father and him, but Robb fell in love and married Talisa Maegyr instead.
Black Walder and Lothar Frey arrive at Riverrun after Robb Stark offers to renew their alliance, but Black Walder relays that Lord Walder insists that Edmure Tully must immediately marry Roslin, having "gone off" long engagements after Robb reneged on his engagement. Edmure initially refuses, but eventually consents after bowing to family pressure as well as his desire to make amends for his blunder at the Battle of Stone Mill.
In the books
In the A Song of Ice and Fire novels, Roslin is born from Lord Walder's sixth wife, Bethany Rosby. Roslin is the fifth child that Bethany bore Walder, and she has four older brothers: Perwyn, Benfrey, Willamen, and Olyvar. Members of House Rosby are known to have frail health to begin with, and Bethany's frequent pregnancies took a heavy toll on her body. Walder kept Bethany almost constantly pregnant, having a new child every year of their marriage, and ultimately Roslin's mother died not long after she was born.
Roslin is described as being the prettiest of Walder Frey's offspring. She is small with very white skin, a pretty face with a small chin, delicate nose, and big brown eyes. Between her teeth she has a small gap. Her hair is brown and reaches her waist. She has a gentle nature and a talent for music.
- Roslin Frey at A Wiki of Ice and Fire (MAJOR spoilers from the books)
|Lord:||Lord Walder Frey||Heir:||Ser Stevron Frey|
|Seat:||The Twins · Riverrun||Lands:||Riverlands|
|Title(s):||Lord of the Crossing · Lord of Riverrun · Lord Paramount of the Trident|
|Current members:||Arwaya Frey · Derwa Frey · Freya Frey · Janeya Frey · Lothar Frey · Marianne Frey · Merry Frey · Neyela Frey · Olyvar Frey · Roslin Frey · Sarra Frey · Serra Frey · Shirei Frey · Walda Frey · "Fat Walda" Frey · Waldra Frey · Waldron Frey · Ryger Rivers · Black Walder Rivers|
|Deceased members:||Joyeuse Erenford|
|Household:||Malcolm · Talbot|
|Overlord:||House Baratheon of King's Landing|