Renee Lamaire was a Belgian nurse whom Roe befriended (portrayed byLucie Jeanne) in the aid station in Bastogne while getting medical supplies.
While it was unclear if Roe had met with the nurse, a nurse called Renee Bernadette Emilie Lemaire was indeed working in an aid station in Bastogne at the time. Lemaire volunteered her services at the battalion aid station on 21st December 1944. She helped tend to over 150 seriously wounded patients per day without adequate rest or food, and offered great assistance. Lemaire was killed during the Christmas Eve bombardment when a bomb made a direct hit on the aid station. She was wrapped in a parachute and buried in Bastogne by the soldiers.
According to Wikipedia, she managed to save six soldiers from the burning building but perished when she returned to try and save a seventh.