Obara Sand

Obara Sand is the bastard daughter of Oberyn Martell and an Oldtown whore. She is the eldest of the infamous Sand Snakes.
A prickly, hot-tempered woman who is given to martial pursuits as she considers herself a warrior, wielding a spear and whip. She is hard, quick and strong. Obara is a big-boned woman, long-legged, rat-brown hair.
When her father came to claim her, her mother did not want him to take her. He threw a spear down at her mother's feet and slapped her mother. Then Oberyn asked Obara which weapon, the spear or the tears, she would choose. Obara chose the spear. Her mother drank herself to death within a year.