Joyce was born in the quiet year between the crisis of the Supernatural Crisis Act and the Reckoning, and had her name as a homage to her late grandmother Joyce Summers. She lived with her parents in their house in San Francisco, and had Mr. Gordo and a Vampy Cat plush toys.
Despite their fear of leaving Joyce an orphan, her parents were both present during the battle of the Reckoning. While Dawn had to go the Willow's empowerment center to open the portal that expelled the demons from the Earth dimension, Xander couldn't leave her alone to face such danger. They left Joyce under her grandmother Jessica Harris’ care, and were able to both return home after the battle.