The name of the Ewok who befriends Leia in Star Wars is Wicket W. Warrick. Wicket was the first Ewok to appear on screen in the 1983 film Return of the Jedi. He encountered Princess Leia Organa after she survived her speeder bike chase, brought her to his tree-top Ewok village, and made contact with the Rebel Alliance during the Battle of Endor. Leia and Wickets friendship is featured in various Star Wars media, including the childrens book "Leia and the Ewoks" and a Princess Leia and Wicket the Ewok double pack.