Once you touch the Force, it's always apart of you.
Leia Organa, a legendary knight of the Jedi Order and senator of the New Republic, was the force-sensitive biological daughter of the Chosen One, Jedi Knight Anakin Skywalker, and Senator Padme Amidala. She became princess of Alderaan, adopted by Bail Organa and his wife Breha, after Skywalker's fall and rise as Darth Vader, and her mother's death giving birth to Organa and her twin brother.
Born in 19 BBY, Leia was raised on Alderaan for all her early childhood and teenage years, being groomed to inherit the throne of her mother, and being trained in politics by her father Bail. She was unaware of her true lineage, and even more her special gift inherited from her bloodline. Leia Organa eventually succeeded Bail by representing their homeworld in the Imperial Senate, though secretly she supported the Rebellion. During the Galactic Civil War, however, Alderaan was destroyed along with its inhabitants and the royal family by the Empire's DS-1 Death Star Mobile Battle Station, causing Organa to openly fight the New Order as a leader of the Rebel Alliance.
Following her family lineage, Leia undertook the path of a Jedi to help her brother defeat Vader, training under Yoda. Soon after, Yoda passed on into the Force, leaving her and Luke the last of the Jedi, and the two confronted Vader and Sidious aboard the second Death Star. In the aftermath of the Battle of Endor, Organa married gave up the Jedi arts when giving birth to her son, on the day of the Empire's capitulation in 5 ABY. In the following decades of peace, Leia became a senator in the New Republic, eventually marrying Han Solo, and adopting an influential role within her work.
Adopting the military rank of general, she led the Resistance during the Cold War and sought to protect the galaxy. Despite her efforts, the First Order succeeded in destroying the New Republic, and Organa's husband died at the hand of the hands of a dark acolyte in 34 ABY.
The other Skywalker
After the Battle of Endor, knowing the origins behind her lineage, Leia undertook training in the Jedi arts from her brother. While Skywalker acted as her spiritual guide and instructor, many of the lessons passed on from brother to sister resonated deeply with Leia, coming to understand much about herself and the Force. Per choice of location, they settled on Ajan Kloss, a jungle moon teaming with life, as a training ground, noted by Skywalker to be similar to Dagobah.
Skywalker passed on many of the lessons Yoda and Obi-Wan taught to him on for his sister, including the basics of telekinesis, lightsaber combat, and meditation. Leia would construct her own blue-bladed lightsaber, its design reflecting her upbringing on Alderaan, and though she was not as gifted like her brother, she became very skilled in the craft of lightsaber combat.
During their many sparring sessions, Leia would best Luke on certain occasions, and at another point, she aimed for Luke with her blade, but missed and slashed the body of a particular tree, leaving a mark that would heal for decades to come. To heighten and develop her senses, Leia and Luke utilized various repurposed tools in their training together, including marksman-H training remotes and A-wing helmets with a cover that would block their vision, putting them to use in as they sparred and to block blaster fire from the training remotes.
During her brief stint as Skywalker's padawan, he explained to Leia, from personal experience and what Yoda had told him, that the Force could offer someone visions of the future, past, and even the departed. This helped Organa understand how she was able to retain a memory, or just flashes, of her biological mother, despite passing away shortly after giving birth to her and Skywalker.