Winona is a character featured in "Z Nation", first encountered in Season 3 episode 6 "Doc Flew Over the Cuckoo's Nest"
Nothing is known about Winona's life prior to the outbreak except that she was a patient at a clinic for the criminally insane. She was among other a kleptomaniac.
Held at the clinic by Nurse Ratched, she follows a daily routine. When Ratched is killed, Winona escapes with the other patients. She hot-wires a bus. She then drives off with the other patients, leaving Doc and 10K behind.