Catelyn Stark
Catelyn Stark, a devoted mother to her five children, harbors contempt for her adopted son, Jon Stark. The show, however, doesn't fully capture the depth of her harshness toward him. But a more significant difference between the show and the book lies in Catelyn's fate.
In George R. R. Martin's literary world, her story doesn't conclude with the Red Wedding. Instead, her body is recovered and reanimated by Beric Dondarrion, transforming into Lady Stoneheart, a significant character in later books. This narrative divergence adds an intriguing layer to her character's journey.