Now that she knew the truth about her parentage and her Force powers, Leia trained as a Jedi with Luke, honing her Force abilities and constructing a lightsaber. But she ended her apprenticeship after having a vision that her Jedi path would end with the death of her son.
Leia wanted to lead and reshape the galaxy, but wielding the same power that had corrupted Vader would be too big of a temptation because she would have become a powerful Jedi. So, it was safer to choose happiness, marry Han and avoid becoming a Jedi.
We see in legends and Canon that Leia is not the most invested in her jedi heritage. Obi-Wan didn't know there was another Skywalker until Yoda said something. Luke had begun Jedi training and it was easier to focus on one Skywalker at a time. A Jedi can only have one apprentice at a time after all.
Why did Yoda want to train Leia instead of Luke? For the reasons he said. He had watched Luke growing up. Luke was too unsteady, too undisciplined, always looking at the horizon, never on where he is and too “old” meaning set in his ways.
A Jedi needs to be a selfless servant, not an aggressive warrior. Yoda's teachings were focused on balance, both literally and figuratively. He wanted Luke to gain an understanding of the Force so that he would not be consumed with the prospects of combat.
In Empire Strikes Back, when Yoda responds, "No, there is another." Is it possible he was talking about Rey? If you watch the movies, this is answered clearly in, “Return of the Jedi” by Ben Kenobi's ghost. “The other he (Yoda) spoke of is your twin sister.” In other words, Leia Organa.
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.
Summary. Obi-Wan Kenobi believed Luke was the Chosen One, viewing him as the galaxy's last hope to bring balance to the Force and fulfill the prophecy.
Leia does not seem to react to tragedy. Instead, she has this wonderful ability to stay perfectly alert, reasonable, and careful of the feelings of others. She witnessed the destruction of her entire planet, and still had the mental and emotional strength to escape with Luke and Obi-Wan.
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.
Even though Leia was rather advanced for her age, having learned to speak and walk before the age of one, she did not show any signs of Force potential—much to the relief of her adoptive father, who knew that being a Force-sensitive in Palpatine's Empire would be a heavy burden.
As brother and sister touched, Leia understood that Luke wasn't physically there, but a Force projection. His confrontation with Kylo bought the Resistance time to escape Crait, with Poe taking charge. Aboard the Millennium Falcon, Rey wondered how the remnants of the Resistance could possibly keep fighting.
In Star Wars, younglings were traditionally recruited into the Jedi Order from an early age — so young that 9-year-old Anakin Skywalker faced opposition as being too old to train. However, during the original trilogy, Yoda and Obi-Wan Kenobi resolved to train a 19-year-old Luke Skywalker.
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.
Originally Answered: In "Obi-wan Kenobi", why is Leïa played by a 6-8 years old while she is supposed to be 10? Vivien Lyra Blair is 9, so she would have been 8–9 when Obi-Wan Kenobi was filmed, not 6–8. Carrie Fisher was a famously small woman. It makes sense for her to be played by a small child.
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.
Return of the Jedi establishes that Yoda was aware that Anakin Skywalker had fallen to the dark side and become Darth Vader. When questioned by Luke Skywalker, he confided that Anakin was Darth Vader. Later, Obi-Wan Kenobi's Force ghost confirmed that Anakin had indeed fallen to the dark side and become Darth Vader.
Yoda considers Luke to be the last Jedi because he adheres strictly to the Jedi Code and does not accept unconventional training methods like those used by the "Bokken Jedi." Yoda believes that the "Bokken Jedi" have deviated from the path of the light and are heading closer to the dark side due to their aggression.
She replies, "Myself," to which Luke says, "Because you're a Palpatine. Leia knew it, too" This realization takes Rey by surprise, as there had been few hints about her heritage up to that point.
