What is the fine-grained topic of the following text: It also contained the detail that Boyega's character is a Stormtrooper who switches sides, which Badass Digest's Devin Faraci says is "the single most confirmed piece of news I've ever written about in terms of sheer volume of independent sources who agree." Only return the topic.
Boyega's character in Star Wars being a Stormtrooper who switches sides.