Olenna Tyrell

Olenna Tyrell, is an unseen character in Game of Thrones.

Olenna Tyrell is the widow of Luthor Tyrell and the mother of Mace Tyrell, the Lord of Highgarden and the head of House Tyrell. She is the grandmother of his children Willas, Garlan, Loras and Margaery. She was born into House Redwyne.

In the books
In the Song of Ice and Fire novels, her family remains the same. She is described as a wizened, cunning old woman with a wicked wit and a sharp tongue. She is known as the "Queen of Thorns" for the rose thorns in the sigil of House Tyrell.