Cora Prescott is Lucky's bossy aunt in Spirit Riding Free, she came to Miradero to help Lucky grow into a fine young woman with posture but later in the series moves it the inn because she feels like she doesn't fit into Frontier life.
Cora claims that she would never let a barn animal into her home but she showed a weak spot when she adopted Clancy, a goose who was meant to be Christmas Dinner in Season 2.