Aunt Jane is the children's great-aunt and Grandfather's sister, as well as Joe Alden's aunt. She makes her first appearance in Mystery Ranch, the fourth book. She is approximately 1 year older than James. She married Andy Bean when she was 72 (he is two years younger than she is). The books indicate that her birthday is in the summer, as she celebrates her 70th birthday in book 4.
Her favorite color is blue and she likes dogs.