As a result of Amidala's death and Anakin's fall to the dark side of the Force, the Skywalker children were separated and sent into hiding, with Leia adopted by the royal family of Alderaan while Luke was raised by his relatives on Tatooine.
There's less likely of a change that Vader will sense them. If they're together the entire time then they stick out like a sore thumb for force sensitive beings.
Yoda may have wanted to train Leia instead of Luke, but he was wrong - precisely because he did not understand that the redemptive love of a son towards his father was what would bring balance to the Force. Fortunately, the will of the Force won out, and Luke was the one chosen to train as a Jedi instead of his sister.
This made Lucas realize that the prospect of Vader turning his sister to the dark side would make Luke lash out the way he did. Thus, the nascent concept of Luke and Leia being siblings provided a major emotional jolt for Vader and Skywalker's climactic fight.
Why This Luke & Leia Scene Was Cut From The Empire Strikes Back
Did Vader know Leia was his daughter?
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.
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.
As the fans will remember, in Episode I it is mentioned that Anakin was conceived by the Force, since his mother, Shmi Skywalker, claimed that there was never a father involved in her pregnancy.
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.
Padmé died shortly after giving birth to Luke and Leia, swearing with her last words that there was still good in Anakin Skywalker. The twins were split up, with Luke going to Tatooine with Obi-Wan while Bail took Leia to Alderaan. Later, the children born on humble Polis Massa would change the fate of the galaxy.
In Return of the Jedi, as Obi-Wan was telling Luke he had a twin sister, Luke listened to the Force for insight to confirm who she was. Yoda and Obi Wan told him he had s sister. The Force helped him sense that it was Leia.
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.
Finally, Rey is Kylo Ren's aunt through Anakin Skywalker. This means that Kylo and Rey's romance is just as genetically awkward as Luke and Leia's kiss on Hoth was. Granted, neither pair knew they were related at the time, but that's no excuse.
Master Yoda knew that Darth Vader was once Anakin Skywalker - the boy he sensed too much fear in to train way back in Star Wars: Episode I - The Phantom Menace.
Summary. Jar Jar Binks's clumsiness may not be genuine, but rather an act to disguise his true nature as a Sith Lord infiltrating the Republic. Palpatine carefully orchestrated events to manipulate the galaxy, and Jar Jar's involvement suggests he may have been the eyes and ears on Naboo.
There are two components to the Chosen One prophecy; their origin, and their mission. The Chosen One is a specific individual who shall be "born of no father." Rey's father may have been a failed clone of Palpatine, but he was a father nonetheless, and thus Rey cannot meet the criteria to be called the Chosen One.
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…
They realize they're siblings in RotJ, but I'm rereading the Thrawn trilogy, and while they talk about being siblings and not knowing who was older, they don't use the word 'twins,' unless I'm missing it.
Did Luke and Leia know they were siblings when they kissed?
At the time, neither Luke nor Leia knew they were siblings, but this scene still feels a little odd given the context of their relationship as revealed in Return of the Jedi.
While in the Ewok village, Luke revealed his true lineage to Leia. She was shocked to discover they were brother and sister, though deep down, she always knew this to be true.
