Cassie Wainwright was Jonah's fiancee in 1859, the daughter of his military commander Col. Marcus Wainwright. She was placed in the care of several soldiers who were planning to rob the payroll, and they left her to be brutally murdered by the Comanche.
An amalgam version of Tall Bird and Cassie WainWright appears in the 2010' film Jonah Hex.
In the movie Cassie is a native american woman (Like Tall Bird). She and Jonah are married and have a son named Travis Hex. Cassie and Travis were killed by Quentin Turnbull and his men because Turnbull blamed Jonah Hex for the death of his son, Jeb, at the Fort Charlotte Massacre during the Civil War.
Cassie was played by Julia Jones.