After his redemption, after bringing back balance to the force, after the return of the Jedi, Anakin would have definitely held a bit of remorse, not to forget, it was Obi-wan who taught Anakin how to become a force ghost, to stray oneself from the cosmic force and assume identity with the living force.
Anakin Skywalker ultimately ended up hating Obi-Wan Kenobi for many misguided reasons, but Darth Vader's subconscious response to the Jedi's final declaration of love in the Star Wars prequels shows the real reason he could never forgive him.
Vader doesn't regret falling to the Dark Side (Anakin does). He regrets being defeated by Obi-Wan. That's why, when he sees that Obi-Wan is full of guilt, and no longer wants to kill him, he "comforts" him by saying that he's not his failure.
Though Obi-Wan was often an important ally for Anakin, the young Jedi could never see past his envy, even going far enough to allow himself to believe that his master was having an affair with his wife. In the end, Anakin's own jealousy was his undoing and the reason that he would never surpass his master.
Obi-Wan only believed Anakin could be saved when Luke did on Endor. So, at that moment on Mustafar, Obi-Wan should have finished Anakin, but he didn't have the courage to do it because ironically he had an attachment to Anakin.
The reasoning comes from, not only his fears that he isn't strong enough to defeat Vader after 10 years in hiding but the fact that facing Vader means Obi-Wan will have to face up to his greatest failure.
learn how Vader felt upon striking down Kenobi. from Yoda, rather than feeling relief. or vindication at finally destroying his old master, Vader, or rather Anakin, was instead. overwhelmed with utter loneliness and sorrow, having killed one of his last. remaining links to his former life.
At the time, it's likely Obi-Wan smiled because he was about to become one with the Force, and he was fine with that after seeing Luke, their last hope, make his great escape.
Because what's being conveyed is that Obi-Wan Kenobi is accepting that Anakin Skywalker is “dead” and a Sith Lord named Darth Vader is in his former friend's place. He's washing his hands of his responsibility to his former apprentice by acknowledging that Anakin is, in his mind, a lost cause.
"Tell your sister you were right" were Anakin's last words. Vader's last words were "If you can not be turned to the Dark Side, then perhaps she will."
The fact that Anakin was redeemed and finally fulfilled the prophecy made him a hero. As a Jedi Anakin sacrificed himself to save his son and restore freedom to the galaxy. That is why I believe he was forgiven by Yoda and Obi-Wan.
In Star Wars Legends Leia was visited by the force ghost of her father Anakin Skywalker, the man who used to be Darth Vader. It wasn't a pleasant meeting as Leia was unable to forgive him for the things he'd done no matter how hard he begged, and it was the only time she saw him.
The only things that Obi-Wan had in his favor were his defensive style and knowledge of his companion's nature. Luckily, that was enough for Obi-Wan Kenobi to survive against Anakin long enough to deliver a finishing blow.
Many are often shocked to find that Obi-Wan was only 57 years old when he died fighting Darth Vader in A New Hope. For many, the issue of Obi-Wan's age is a plot hole, as he was initially seen as this old solitary man, but Star Wars made him younger than he looked in the original trilogy.
The canonical comic Star Wars: Darth Vader #7 confirms the younglings' deaths caused Anakin grief, self-loathing, hatred and pain, fueling his descent even further into the dark side. Those negative emotions also power the dark side, meaning Anakin likely felt stronger as he killed the younglings.
The theory was made all the more convincing by the Obi-Wan Kenobi Disney+ series, which depicts the Jedi defeating Vader using his full power. Darth Vader was the stronger of the two by far. However, as with most lightsaber duels, the victor is the one with the greater connection to the Force.
Like Obi-Wan, the comic is set between Episodes III and IV, and thus explores a rawer Vader, one who still hasn't let go of his old life and is adjusting to his role as the Empire's iron fist. In the Obi-Wan finale, Vader declares, “I [killed Anakin Skywalker].” Dark Lord of the Sith is the story of how he did so.
Kenobi bested Anakin, severing his limbs, and leaving him to die, burning on the shores of a lava river. Darth Sidious recovered Anakin's broken body and returned with him to Coruscant. Medical droids rebuilt Anakin with cybernetic parts, encasing him in dark armor to complete his transformation into Darth Vader.
As we know, the thing Vader hates most, is himself. The way I interpret the end of their fight in Obi-Wan, when Vader is screaming “Obi-Wan!” I think he is basically asking for him to not leave him again, and finish the job. He clearly was in no state to fight, or else he would've continued to fight Obi-Wan.
