While I agree it’s better to use real voice actors in most acting & pre-recorded situations, the audio is dynamically generated on the fly in Fortnite Darth, it’s all AI responses, including referring to you by the name of your skin/character you happen to be playing as.

I’m not sure how that could work with a pre-recorded actor, unless they program a whole AI vocal off them which while possible is a much bigger undertaking I believe?

Had a go with it today, & it was quite fun & novel, especially how it refers to you by name & asks some specific questions on things you’re doing in game at that moment, & responds to questions you ask it in a relatively good if simple/limited way. It’s obviously a fairly a basic implementation so far, but this is likely the beginning of a lot of in game NPC character content whether we like it or not…