Darth Vader would probably have a complex reaction. He might feel a sense of familiarity that he tries to suppress. His first instinct could be to destroy R2D2 as it represents a part of his old self that he has tried to forget. But at the same time, he might be intrigued by what the droid could tell him about his past or the Rebellion.
Well, in such a fanfiction, R2D2 could use his beeps and whistles to communicate something unexpected to Darth Vader. It could be some long - forgotten information about Anakin Skywalker that makes Vader question his path. And Vader might find himself hesitating to harm the little droid because of this new - found knowledge.
Their relationship could start off as adversarial. Darth Vader sees R2D2 as just another piece of Rebel technology to be destroyed. But as the story progresses, he might start to respect R2D2's tenacity and the fact that it has survived so many battles. For example, if R2D2 helps Vader in some small way, like leading him out of a dangerous situation, Vader might start to view the droid differently.
Ezra's reaction would also depend on his state of mind at the time. If he was feeling confident and strong in the Force, he might be more bold in his approach to Vader. He could try to engage in a battle of wills through the Force, trying to push back against Vader's dark side influence. But if he was already weakened or doubting himself, the sight of Vader could make him feel hopeless and desperate, leading to a more erratic or panicked reaction.
Darth Vader would likely be conflicted. On one hand, he could see the potential in his younger self to become a powerful Sith. On the other hand, he might be reminded of his own lost innocence. He might give his younger self some warnings about the path he is about to take, but also encourage the dark journey.
One plot idea could be that R2D2 is captured by Darth Vader. But instead of destroying the little droid, Vader becomes curious about the information it might hold. He tries to hack into R2D2's memory, leading to a series of tense moments as R2D2 tries to protect the secrets within. Maybe R2D2 has some long - lost Jedi knowledge that Vader thinks could help him overthrow the Emperor.
In the 'naruto is like darth vader fanfiction', their journey of self - discovery could be seen as similar. Naruto has to constantly figure out his place in the ninja world and how to control his power. Darth Vader is on a journey of self - discovery too, as he grapples with his identity as Anakin Skywalker and his role as Darth Vader. They also have a sense of isolation in some ways. Naruto often feels alone in his struggles, and Darth Vader is isolated in his dark armor, cut off from his former self and many human connections.
Darth Vader could emerge victorious. His mastery of the Force gives him an array of abilities such as telekinesis and mind control. He could potentially use these to disable Naruto before he has a chance to launch a major attack. Also, Vader's lightsaber skills are top - notch. If he can get close to Naruto, he could deliver a fatal blow. And in a one - on - one situation, without the help of his friends, Naruto might find it difficult to counter Vader's unique powers.
Luke could react with a newfound sense of responsibility. Seeing Vader's fall, he might feel that it is his duty to help any other fallen Jedi or those who are on the brink of falling to the dark side. He might also have a moment of self - reflection, wondering if he could ever be tempted by the dark side in the same way Vader was.
It could explore their relationship by showing the contrast between their current selves. Ahsoka is a free - thinking Jedi - like figure, while Vader is a servant of the Emperor. Their relationship could be one of enmity, with Ahsoka seeing Vader as a fallen hero and Vader seeing her as a nuisance to the Empire.
If Ahsoka joins Vader in fanfiction, their relationship would become extremely complex. At first, it would likely be filled with anger and resentment from both sides. Vader might see her as a reminder of his past failure as Anakin, and Ahsoka would see him as the fallen Anakin she once knew.