Vader didn't sense Luke as someone special until he made the connection that Luke was his son. Before that he was just another person with a connection to the Force. So Vader could sense Leia as much as anyone else but since he didn't know about his paternal question to her she didn't stand out to him as unique.
The short answer is that creator George Lucas had no idea Leia would end up becoming Darth Vader's daughter. But Star Wars books and comics have tried to address the decades-old plot hole.
Vader learned that Leia was his daughter by sensing it from Luke in Return of the Jedi. Vader learned about Luke after he sent Boba to capture Luke alive, but he escaped and Boba only managed to learn his name: Skywalker.
Key details in the Obi-Wan Kenobi series connect to the original Star Wars movies, hinting Darth Vader knew and ignored Leia was his daughter.
A Skywalker by blood, Leia Organa is known to be Force sensitive.
She finds it easy to accept Luke as her brother, but she is horrified by the idea Darth Vader was her father.
In the main Star Wars timeline, of course, Darth Vader's attempts to resurrect Padmé on Mustafar were doomed to failure. But it's fascinating to speculate what would have happened had he been successful.
It's well known that Star Wars lead characters Luke Skywalker and Princess (now General) Leia are brother and sister. The estranged siblings didn't know about their familial relationship until "Return of the Jedi." They even shared a passionate kiss in the previous movie, "The Empire Strikes Back."
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.
Affiliation(s)
Boushh was a male Ubese from Uba IV who worked as a bounty hunter. Following his little-known demise at the hands of the Black Sun crime syndicate, Princess Leia Organa impersonated him in order to infiltrate Jabba's Palace and free Han Solo.
While Leia is denying Han's assertion that she has romantic feelings for Han, Leia kisses Luke passionately to demonstrate that Han "doesn't know everything about women" and to suggest that she has feelings for Luke instead. Leia kissed Luke on Hoth to make Han jealous.
The students concluded that Luke is therefore 1.75 years younger than Leia, possibly rendering them the first twins ever to have over a year between their ages.
George Lucas didn't plan on making Darth Vader the secret father of Luke Skywalker. As much as fans have been told that Lucas had a massive plan for the Star Wars saga prior to 1977, the sources closest to that process say the opposite.
At some point after his transformation into the armored Darth Vader, Amidala's husband, the fallen Jedi Knight Anakin Skywalker came to visit the mausoleum, stricken by grief and remorse for his part in her death.
Amidala's funeral contained an open casket procession drawn through Theed by four gualaar , in which her hands clutched a japor snippet—one meant to bring her good fortune—that her husband had made for her shortly after they first met.
After his battle with Obi-Wan on Mustafar, Anakin's vocal cords and lungs were scorched by lava. Due to this, Darth Vader had to wear an iron lung with tubes connected to a voice synthesizer inside his mask. Using this technology, Darth Vader could speak with a deep, synthetic voice.
She also knows Obi-Wan, and she knows him well. Her holographic plea for help, already iconic, will never be the same. She knows Obi-Wan's real name as well as his alias of “Ben.” When Luke comes barging into her cell and says, “I'm here with Ben Kenobi,” Leia jumps off the bunk in an instant.
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.
In The Phantom Menace, when Qui-Gon Jinn meets tiny Anakin Skywalker and his mother, he goes on about how the Force is like, crazy strong with Anakin or whatever, and then asks his mother about Anakin's dad. Shmi Skywalker is pretty clear in her answer: There isn't a father. She was impregnated by the Force.
The Younglings Reminded Anakin of How Different He Was
Those negative emotions also power the dark side, meaning Anakin likely felt stronger as he killed the younglings. That, in turn, reinforced his belief that only the dark side could save Padmé.
One such droid was used by Darth Vader in his interrogation of Princess Leia Organa in 0 BBY. When Leia Organa underwent her mind probe, she was injected with a powerful mind-altering hallucinogen that made her very susceptible to suggestion.
And eventually, sparks began to fly. By the end of Episode V: The Empire Strikes Back, Leia professes her love for Han, telling him “I love you. Han — just before being frozen in carbonite — smoothly replies, “I know,” — sealing their love for one another permanently.