Ever since Yoda murmured “There is another” in The Empire Strikes Back, Star Wars has been enamored with the idea of twins. That Luke Skywalker and Leia Organa turned out to be long-lost siblings was a bit of an afterthought on George Lucas’ part — Luke’s twin was originally going to be a different, unintroduced character — but their bond set the tone for a trope that’s echoed throughout the saga.
