Caroline Chase is the wife of Randolph Chase, the mother of Emma and Aubrey Chase, and the aunt of Annabeth Chase and Magnus Chase.

Magnus Chase and the Gods of Asgard

The Sword of Summer

In the epilogue, Loki produces an image of Caroline, Emma and Aubrey in order for Randolph to continue working for him.

The Hammer of Thor

Caroline appears in a flashback when she and her daughters accompany Randolph on finding The Sword of Summer in the Massachusetts Bay.

Unfortunately, their yacht was caught in a freak tempest, causing the boat to roll starboard and drowning her and her daughters.