Born into the once-great aristocratic Agravain family, Lygia Genevieve Agravain was the eldest of two daughters. Her sister Livia was born three years later. The girls' parents were eager to restore their family's honor and prestige, so they sent the more studious Livia away to learn how to become a mage and instructed Lygia to find a respectable husband with wealth and property.
At seventeen, Lygia began courting Marcus, a mage. His wealthy, respected family opposed the possibility of marriage between them, but Marcus ignored them and continued to pursue her.
During a festival, a troubled teenage Livia returned home and the relationship between the sisters soured. Livia was later charged with apostasy and witchcraft in the middle of the party and banished from Zantium. Lygia didn't oppose her banishment but resented the police for publicly humiliating their family. She would later regret this spiteful treatment of her sister, but their relationship never recovered from this particular slight, which Livia held as a grudge against her for the rest of her life.
Following the incident, Marcus' family resented her more than ever. Against their wishes, Marcus married her. Lygia gave birth to their only child, Marena, shortly after.
After the fall of Zantium, Lygia and her family were forced to flee, accompanied by Rhys Sioned, Marcus' paladin. After three years on the run, Rhys was killed while defending them during a racially-motivated fight. Because of this incident, Lygia urged her husband to try staying with her estranged sister in Amarna, a city known for its cosmopolitan population, tolerance, and liberal values.
Amarna proved only a slight improvement over the other places they had been, with animosity and hostility toward Zantines being almost as common among Amarnans. Lygia began working as a weaver as it was the safest job available, not requiring her to leave home and walk the dangerous streets alone.
While they lived at the magic shop with Livia and her young protege Ardath Dastagir for the next ten years, both Lygia and Marcus were in constant conflict with her, finding her methods and practices abhorrent. Like her husband, she was ambivalent about Marena's marriage to Ardath, but was quicker than Marcus to give her blessing, thinking only of her daughter's happiness.
Lygia perished along with her sister Livia during a plague outbreak.