Darth Vader didn't learn he had a daughter until Return of the Jedi, when he stood before Emperor Palpatine. The Emperor's power probed Luke's mind, attempting to goad him to fall to the dark side, and he discovered Leia's existence. "Sister," the Emperor taunted.
Did Darth Vader ever find out Leia was his daughter?
Vader discovers Leia is his daughter because of Luke.
It's not until Return of the Jedi, when Luke confronts Vader and the Emperor in the third act of the film, that the Sith Lord realizes his son is there to protect his twin sister.
Alderaan's princess knew she had been adopted by Bail and Breha Organa after the Clone Wars, but she had no idea who her parents were. That was until Luke Skywalker told her the truth - that he was the son of Darth Vader, and that she was his sister.
She was not genetic Organa but still, she is rightful Organa. So yes, Palpatine knew that Leia is daughter of Anakin as well as the fact that Ben is the son of Leia and Han.
Leia's Force abilities and her lack of awareness of her true identity also contributed to Vader's inability to sense their familial connection. Vader's denial of Anakin Skywalker's legacy and his fear of getting hurt again prevented him from realizing the truth about his children until later in the original trilogy.
Did Vader Sense Leia Was His Daughter in A New Hope? (Legends)
How did Vader know Luke was his son but not Leia?
In canon, Vader found out because Luke told Boba Fett that he was “Luke Skywalker.” This was explained in the canon comic Star Wars (2015) 5. Vader only sensed Leia was Luke's sister because Luke was thinking about her on the Death Star II. When Vader tortu…
Anakin Skywalker never knew Padmé was pregnant with twins, and he believed his child had died with his wife. He had no idea Padmé had given birth before she died, still less that the Jedi had spirited the children away and hidden them.
Yes. In the book 'Tatooine Ghost', Leia learns of Anakin's life prior to his evolution into the Darth Vader personae. This revelation leads her to forgive him. She even named her third child in memory of her father.
Darth Vader acts like he doesn't even know C-3PO or R2D2. They were with him since he was a child. He did everything he could to forget his past. Also, his plating had been replaced many times, and protocol droids all look very similar.
He eventually became so desperate to find a way to prevent Padmé from dying that his fear was ultimately the main reason that led to his fall to the dark side. Vader screaming for the loss of Padmé. Even as a Sith Lord, Anakin still loved Padmé very much, but felt great guilt for his actions against her.
Leia's true family history remained a closely-guarded secret for years, with Leia well aware nobody would trust the daughter of Darth Vader. Marvel's Poe Dameron comic series reveals that Leia actually went to Naboo to learn more about Padmé, trying to get to know her mother through her friends and confidants.
Luke and Leia never sensed that they were twins until Return of the Jedi despite both being sensitive to the Force. Anakin Skywalker's twin children are the original Star Wars trilogy's driving force, having been separated after Padme's death.
Did Padme ever sleep with anyone before Anakin? It is theoretically possible, but highly unlikely. She did have feelings for Clovis, but that relationship didn't really go anywhere and there really aren't other romantic prospects we know about.
Why did Padme wait so long to tell Anakin she's pregnant?
However, she chose not to tell Anakin, presumably because he was about to go into a battle. Anakin was prone to letting his emotions affect him, and knowing that Padme was pregnant would've thrown him completely off the task. And Padme probably didn't think that her husband would be fighting battles for months to come.
When Padmé and Anakin were captured on Geonosis, believing they were going to die, she confessed her romantic feelings to him. After this, they could not deny their romantic feelings for each other, so they secretly got married on Naboo.
Yoda. Yoda's knowledge of Luke Skywalker's true parentage was also confirmed in Return of the Jedi. As with Obi-Wan, Yoda believed that Anakin's fall to the dark side made him unsalvageable, with the Darth Vader persona being his only identity following his ascension to Sith Lordship.
Why did Darth Vader not sense Leia was his daughter?
Leia was not using the Force or was currently Force-sensitive during her confrontation with Vader. She began training as a Jedi years later. All these reasons prove my point: Vader didn't know Leia was his daughter, and felt no presence of the Force in her, as she was not currently strong with the Force.
So, how much did Luke actually know about Anakin Skywalker? For his 19 years being raised on Tatooine, Luke got told little about his father because Owen Lars thought it best he knew as little as possible to keep him safe from the Empire and away from the Jedi Order.
While Darth Vader's obsession with Luke Skywalker in The Empire Strikes Back is seemingly due to the latter's destruction of the Death Star battle station, his revelation to Luke and brief dialogue with Emperor Palpatine recontextualizes his pursuit.
