Arya Stark

Arya Stark is a major character in Game of Thrones. She is played by Maisie Williams and debuts in the first episode.

Arya Stark is the youngest daughter of Eddard and Catelyn, and the sister of Robb, Sansa, Bran and Rickon and half-sister of Jon Snow.

In the books
In the Song of Ice and Fire novels Arya is nine years old when the action begins. She is a tomboy who wants to learn how to fight with a sword and ride in tourneys, to the horror of her more demure older sister, Sansa