Mordane

Mordane is a recurring character in Game of Thrones. She is played by Susan Brown and débuts in the first episode of the first season. She only appears in the first season.

Mordane is a septa (priestess) in the Faith of the Seven. She serves at the sept in Winterfell. Her secondary duties involve tutoring Sansa and Arya Stark in needlework, embroidery, singing and other lady-like duties.

Season 1
Septa Mordane tutors Arya and Sansa in needlework. She compliments Sansa on the skill of her work, but doesn't remark on Arya's grudging efforts. Mordane accompanies Arya and Sansa to King's Landing and dines with them. She disciplines Arya when she threatens to kill Joffrey Baratheon for his actions on the Kingsroad. Mordane shows Sansa the throne room as part of Sansa's tutoring on the history of the Seven Kingdoms. Sansa is concerned over what will happen if she has no sons, only daughters, a concern that Mordane dismisses as highly unlikely.

Mordane accompanies Arya and Sansa to the Hand's tournament and is present when Littlefinger explains the background to his nickname to Arya. Mordane chaperones Sansa when Joffrey meets her to apologize for his behavior on the Kingsroad. Mordane hears combat in the courtyard at the Red Keep. Fearing the worst she orders Sansa to run to her room and bar the door to anyone she does not know. After Sansa leaves she is confronted by several Lannister soldiers. Joffrey takes Sansa to the traitors walk and reveals that Mordane was beheaded, her head placed upon one of the spikes.

In the books
In the Song of Ice and Fire novels, Septa Mordane is a loyal servant of House Stark, despite the fact that most of the family worships the Old Gods of the Forest rather than the Seven. She finds Sansa to be a willing, able and promising student. She despairs at the tomboyish Arya, who'd rather be running around the castle and play with swords. Despite this, she is fond and fiercely protective of her charges.