An individual was an Imperial prisoner on the planet Kethmandi. Sometime before 10 BBY, the individual escaped from a prison train with the help of the Wookiee Chewbacca, who sacrificed his own freedom to save the prisoner.
The individual was first mentioned in the 2018 book Solo: A Star Wars Story: A Junior Novel. The non-canon television series LEGO Star Wars: All-Stars later identified the prisoner as Lena Freemaker.