The base assumption of why Obi-Wan doesn't remember R2-D2 -- in light of the prequels -- is that Obi-Wan is feigning ignorance in A New Hope to downplay the importance of the droid's arrival.
However, one theory argues that Obi-Wan did recognize R2-D2, but he chose to pretend not to in order to avoid telling Luke the full truth. This would explain certain signs of familiarity between the Jedi and the droid and fit Obi-Wan's pattern of subtly lying to Luke.
You saw how Luke's attitude completely changed when he realised that was actually Yoda and so did Yoda's behaviour. As for the r2 thing, is incredibly likely he just suspected R2 had had his memory wiped several times since they last saw each other.
The lack of recognition could have come from an old man simply not remembering the passing droids of his youth. Lastly, Owen didn't seem the sentimental type to form any emotional attachments to droids. Being a practical man, he viewed them as tools to be used and replaced when they no longer functioned.
After Grogu decides to abandon his Jedi training, Luke has R2-D2 fly Grogu to Tatooine in his X-wing starfighter so that he may be reunited with his guardian, Din Djarin (Pedro Pascal). R2-D2 makes a cameo appearance in Part I of Obi-Wan Kenobi.
Why Doesn't Obi-Wan Remember R2-D2 in A New Hope? - Star Wars Explained
Did R2-D2 remember Anakin?
Star Wars Theory: R2-D2 Didn't Know Anakin Skywalker Became Darth Vader. R2-D2 served Queen Amidala and later Anakin Skywalker, accompanied by C-3PO. Unlike the golden protocol droid, R2-D2 never had a full memory wipe, so he was well aware of all events that happened around him.
in the Dark Horse comic series star Wars Tales, which is now part of legends, it's revealed that Darth Vader did recognize C. 3PO on Cloud City. when 3PO was shot by Stormtroopers, his parts were brought before Vader. because the Imperials thought he could hold valuable.
The saddest thing of starwars for me is c3po and r2d2 because they were there for all the trilogies and they are the only people who remember Anakin when he was good and young....
When C-3P0 was passed on to Bail Organa, his memory was erased. It was not stated that the same had been done to R2-D2, so if he were to remember Obi-Wan (which he did), it would make perfect sense.
Programmed for etiquette and protocol, Threepio was built by a young Anakin Skywalker, and has been a constant companion to astromech R2-D2. Over the years, he was involved in some of the galaxy's most defining moments and thrilling battles.
secondly, in Legends, R2 was given programming that actually restricted him. from sharing any information with Luke or Leia. about their parents or relation to one another. this was all part of the plan. to conceal this information from the twins.
He was still fairly new to the droid's mannerisms, slowly picking up on small phrases and sentences. After the original Star Wars, Luke understands R2-D2 better than ever, so much so that the Jedi Master has full-on conversations with the droid. By this point, there's no question that he's fluent in the language.
Vader mocked Luke for his lack of training in lightsaber combat, and he easily pulled the lightsaber out of Luke's grasp through the Force. However, before Vader could strike the unarmed Luke down, he suddenly recognized Luke's lightsaber as his own former weapon.
Every time she speaks, he remembers Padmé. Fighting alongside Sabé reminds him of fighting alongside his wife. While that is certainly painful enough, it's also reminds Vader of the man he used to be, a past he had long ago attempted to kill and bury. However, the memory of Padmé via Sabé won't let his past stay there.
Darth Vader only learned he had a daughter in Return of the Jedi - but there's no evidence he realized she was Leia before his death and redemption. Darth Vader may have never known Princess Leia was his daughter in Star Wars and never cultivated a relationship with her, even when he was a Force ghost.
Since Bail Organa had C-3PO's memory wiped previously in order to prevent him from spilling the secret of Leia's parentage, it could be that this was a semi-regular occurrence for the droid given he couldn't be trusted to keep quiet about things.
So Owen had no idea his "new" protocol droid's name was C-3PO. A counter to that might be asking why Owen didn't recognize C-3PO's distinct voice, but again, it's worth remembering Owen hadn't seen C-3PO in more than 20 years. It's possible Owen simply forgot what C-3PO's voice sounded like.
Originally Answered: Did Darth Vader ever show he cared about R2-D2 or 3-CPO? Yes, he did. In the comic Thank the Maker, Darth Vader comes into possession briefly of 3PO's disassembled head while on Cloud City.
C-3P0 didn't; his memory was wiped at the end of Revenge of the Sith to prevent him from spilling the beans. Why was Anakin always more attached to R2D2 even though he literally built C-3PO? R2-D2 was almost constantly around Anakin Skywalker during the Clone Wars, serving as his personal astromech.
She senses Anakin when she reaches out to the pilot — and Vader realizes that Ahsoka, his former Padawan, lives on. In Season 2, Episode 18, “Shroud of Darkness,” Ahsoka's guilt manifests as a vision of Anakin, who's angry with her for leaving him all those years ago.
Darth Vader can not use force lighting, because of his severed arms. Robotic hands can't summon the force lighting. However Darth Vader can still use other forms of the force, such as force choke.
