Sansa Stark

The eldest Stark daughter dreams of songs, knights, and a fairy-tale marriage to a prince. Polite, dutiful, and eager to please, she's thrilled by her betrothal to Joffrey and the glamour of King's Landing, unaware of how quickly the court's beauty will curdle into something else entirely.

Sophie Turner plays her naivety with total sincerity, so her early romanticism never feels stupid, just young. The show uses her as its clearest register of how brutal Westeros actually is, and watching her learn to read a room, then a court, then a war, becomes one of the series' most patient character studies.