Grace is the elder sister to Cara Mason.
Grace and Cara were born and raised in Stowecroft, only three years apart in age. Their mother made them matching dresses when they were younger. One day, the Mord-Sith kidnapped her sister Cara, and later her father. It was revealed that Cara, having been tortured into the belief that their father had betrayed her, killed him. Their mother died not long afterwards.
Grace is married to Sirian and they have children, a daughter named Ella and a son.