Margaery Brax

Lady Margaery Brax is the Lady of Hornvale, as the eldest daughter of Alyn Brax by his wife Alyssa. Even though she has the title of Lady of Hornvale, she is merely a figurehead, having lost the bloodless conflict against her younger sister Lysa.

She is unmarried, and due to mental instability, forced to stay in a part of the keep with her lover Olenna Kyndall.