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.
During the Clone Wars, it was common practice to wipe the minds of astromech droids after every mission to avoid the risk of Separatists taking valued information. But Anakin remained staunchly against this idea for R2-D2, meaning the droid never had to worry about losing the memories of his past.
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.
Why Doesn't Obi-Wan Remember R2-D2 in A New Hope? - Star Wars Explained
Why didn t R2-D2 tell Luke vader was his father?
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.
R2-D2 was present when Padmé gave birth to Leia and Luke, so he knew Luke was Anakin's son – but what he didn't know was that Anakin became Darth Vader. In addition to that, Anakin's fall was surely a painful event in R2-D2's life, one that he definitely wouldn't like to remember or even talk about.
A story called “The First Lesson”, written by Jim Zub, explains that Yoda did in fact recognise the droid, but chose to remain silent. “Carefully moving through the swamp while staying beneath the fog, Yoda soon spotted the boy and his droid unpacking their supplies,” reads the passage.
Unfortunately, the entire chapter is told from Yoda's perspective, so it's unknown if R2-D2 recognized Yoda as well. One would imagine he did, since he did not have his memory wiped in Revenge of the Sith, and Yoda has a very distinct appearance and manner of speech.
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.
Shortly after the Galactic Empire was formed, Bail Organa had C-3PO's memory wiped clean in order for the droid to not spill any confidential information. When he purchased C-3PO and R2-D2, Owen Lars also wanted the droids' memories wiped after he learned they were looking for Obi-Wan Kenobi.
Because Lucas wrote himself into a plothole when he made C-3PO belong to Anakin Skywalker in the prequel trilogy, when he clearly had no memory of that in the original trilogy. So his memory had to be wiped. The reason R2-D2's memory couldn't be wiped was because R2 recognized Obi-Wan Kenobi in A New Hope.
On a mission to Pasaana, C-3PO discovered safeguards in his programming made it impossible for him to translate Sith runes that could help the Resistance locate the legendary planet Exegol. With the fate of the galaxy hanging in the balance, C-3PO reluctantly agreed to have his memory erased so the runes could be read.
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 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.
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.
Remember that this is the first (and only) time Vader saw C3PO after RoTS. Threepio was getting pushed into an escape pod by R2D2 by the time Vader entered their ship in ANH. Though he was chased throughout the original series, this was the only time Vader actually saw Threepio, again.
Unlike C-3PO and the rest of the droids used by the Rebellion in the original trilogy, R2 still remembers the fall of the Jedi and would recognize Grogu, whether or not the droid was directly responsible for saving him from Order 66.
However, R2-D2's memory is not wiped; as a result, R2-D2 is the only surviving character at the end of the saga who knows the entire story of the Skywalker family. Both R2-D2 and C-3PO end up in the possession of Captain Raymus Antilles (Rohan Nichol) onboard the Tantive IV.
A reliable and versatile astromech droid, R2-D2 has served Padmé Amidala, Anakin Skywalker, and Luke Skywalker in turn, showing great bravery in rescuing his masters and their friends from many perils.
Why does Yoda look different in the Empire Strikes Back?
In early concepts of Yoda, as well as the novelization of The Empire Strikes Back, he had a blue-skinned face instead of a green one. For The Phantom Menace, he was redesigned to look younger.
Instead of being in the life suit, Vader looks like an older Anakin who never received the devastating injuries, and Padmé and Luke (who struck down Palpatine) are by his side. It's during these visions Palpatine realizes Luke - who he only knew as the Rebel who destroyed the Death Star - is Anakin's son.
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.
