A talented fossil hunter from a poor working-class background in Lyme Regis, whose discoveries challenge the scientific community and enrich the friendship she shares with Elizabeth Philpot.

Elizabeth’s youngest sister, who initially aspires to marry but later finds purpose and satisfaction in village life by creating a popular medicinal salve.

A handsome gentleman fossil collector whose interactions with Elizabeth and Mary introduce both romantic intrigue and financial support to the story.

Mary's resilient and resourceful mother, who navigates hardships while supporting her children's endeavors, especially Mary’s fossil hunting.