Who is Tzivia from Alicia and what is their importance?

Tzivia was a female Jewish partisan who, after the war, ran the Brecha, an organization that illegally transported Jews to Israel. She was impressed with Alicia's ability to outsmart the enemy and her fluency in three languages, and recruited her to be a transporter. Alicia worked for Tzivia until she became ill and was taken to Austria to recuperate by a United Nations relief organization.