Leia Organa never knew her mother, Padmé Amidala. She thought she could remember Padmé - describing her to her brother Luke as "kind but...sad." But in truth Leia seems to have been confused, instead remembering Padmé's former handmaiden (and doppelgänger) Sabé.
After Leia Organa Solo discovered the identity of her mother, she realized that Pooja Naberrie—a former representative of Naboo and a friend she had known since her service in the Imperial Senate—was not only Padmé Amidala's niece but also her own first cousin.
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. Anakin Skywalker never knew Padmé was pregnant with twins, and he believed his child had died with his wife.
Leia is remembering Padme but the images she sees are due to her force sensitivity, to quote Yoda in Empire "Through the Force, things you will see. Other places. The future...the past...old friends long gone." This could suggest that Leia is confusing Force visions with memories.
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.
Star Wars is finally exploring Leia's emotional reaction to the revelation Darth Vader was really her father - as her identity is transformed. Star Wars has finally revealed Princess Leia's reaction to learning Darth Vader was her father.
Summary. Darth Vader's failure to recognize Leia as his daughter in Star Wars: A New Hope stems from George Lucas's late decision to make Luke and Leia siblings. Leia's Force abilities and her lack of awareness of her true identity also contributed to Vader's inability to sense their familial connection.
In the post-2014 canon universe, the story that reveals Darth Vader discovering Luke Skywalker's identity (and thus the fact that the Death Star's destroyer is his son) is issue 6 of 2015's Star Wars comics by Marvel, which takes place sometime shortly after A New Hope.
Han Solo marries Princess Leia and they have three children: twins named Jacen and Jaina, and a younger son named Anakin. Luke reestablishes the Jedi Order, marries a non-movie (but fan favorite) redheaded Force-wielder named Mara Jade, and they have a son, Ben Skywalker (named in honor of Obi-Wan “Ben” Kenobi).
Darth Vader told Luke he was his father in The Empire Strikes Back, leaving Luke shaken to the core. It wasn't until Return of the Jedi that Luke told Leia, but interestingly her focus seems to have initially been on the fact Luke was her brother.
Given that she's the child of Anakin Skywalker, who's prophesied to be the Chosen One, the Skywalker bloodline holds a tremendous amount of power. With Leia's strong connection to the Force, it seems like the most likely solution to this inconsistency is that she's caught glimpses of her mother through Force visions.
Luke gave him unconditional love, but that's not forgiveness. Anakin, as Darth Vader, committed and was complicit in a whole bunch of genocides and other crimes. The films never suggested that these are forgiveable. Furthermore, Anakin's redemption arc comes in that form of concrete action.
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.
Returning to Dagobah to complete his training, an ailing Yoda told Luke the terrible truth that Vader was his father, Anakin Skywalker. Rather than destroy his father, Luke sought to bring him back into the light. At 900 years old, Yoda passed away, telling Luke that there was another Skywalker.
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.
Vader was hunting down the pilot who blew up the Death Star, and hired Boba Fett to find them. Boba was unable to, but he did give Vader a name: “Skywalker.” This, combined with his knowing Luke was Force-sensitive and had been trained by Obi-Wan, was what made him realize the truth.
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.
And during the conversation, Padme is holding her stomach and appears to have a bump, seemingly confirming she was pregnant long before Revenge of the Sith. However, she chose not to tell Anakin, presumably because he was about to go into a battle.
Luke and Leia only discovered they were twins in Return of the Jedi despite being Force-sensitive. Could they have known earlier in Star Wars? Luke and Leia never sensed that they were twins until Return of the Jedi despite both being sensitive to the Force.
Ever since Return of the Jedi, Star Wars has reframed Luke and Leia's kiss as lacking real romantic intent - something Leia did solely to get a rise out of her real love interest, Han Solo.
