This was a blue-bladed lightsaber used by Padawan Leia Organa during her training under her brother Jedi Knight Luke Skywalker. She later discontinued her training and gave the lightsaber to Skywalker after Organa sensed the death of her son at the end of her Jedi path. Skywalker kept the lightsaber with him and after his death at the Battle of Crait, gave the weapon to Rey during the final days of the war between the First Order and the Resistance.