Yuri Sun was a Jedi Knight who studied at the Sarapin Jedi Temple under the legendary Master Kit Ryan. She was the top student in her class and was a master Force-user. After her master's death and the destruction of her temple during the Battle of Sarapin, she exiled herself on Dagobah until she learned that Coruscant had come under attack. Later, it was discovered that Yuri was Deji Skywalker's long-lost sister. During the third year of the Terrifa War, she married Commander Redin Estas.