Prior to the events of “Rogue One,” fans had no idea where Darth Vader chose to live in his off-time. While the reveal of his castle on Mustafar, positioned close to the site where Anakin died and Vader properly began in “Episode III,” gave us plenty of information on its exterior, details of the castle’s interior remain sketchy at best.
Since Rogue One’s release, Lucasfilm’s story division has worked to unite the franchise’s multi-faceted approach to media. Some of this clarification has included that Vader’s castle has a lava dam that originates from a conceptual art piece by Ralph McQuarrie for “Episode IV.” The various designers and storytellers have gone to great lengths to solidify the details surrounding Vader’s unnamed castle, likely because it will play a part in future Star Wars films.
In an Uproxx interview, Doug Chiang, a VP and creative director for Lucasfilm, shared some of the consistent ideas and themes surrounding Vader’s castle and Vader’s uses for it. The discussion included brainstorming on why Vader chose Mustafar, why the castle looks as it does, and so on, and giving feedback like how Vader chooses to use it to center and calm himself, complete with a rejuvenating “bacta tank” to heal his body. That last point was featured in one of the few internal shots Rogue One viewers got to see. Director Gareth Edwards’ own take on the castle was that it serves as a focusing point for Dark Side energies.
As for how Vader’s unnamed castle might play some role in future movies, Episode VIII’s current narrative includes an antagonist character, Kylo Ren, who is fixated on anything even remotely connected to Darth Vader. This would be more than enough to justify an extended sequence of Kylo Ren navigating the decrepit stronghold to learn more about his grandfather and possibly even more on the ways of the Sith and the Dark Side.
The de-canonized Expanded Universe also gave Vader a castle, Cast Bast, on an acid rain-soaked planet. This site served not only as a stronghold for Vader but also for the seven “Dark Side Elite.”