Leia Organa Solo (born Leia Amidala Skywalker) was the daughter of Jedi Knight Anakin Skywalker and Senator Padme Amidala of Naboo, and the younger twin sister of Luke Skywalker. After her birth she became the adopted daughter of Bail Organa and Queen Breha of Alderaan, making her a Princess of Alderaan. An accomplished Senator, Organa was most famous for her strong leadership during the Galactic Civil War and other subsequent galactic conflicts, making her one of the galaxy's greatest heroes. Later she married Han Solo and became the mother of their three children: Jaina, Jacen and Anakin Solo. Around the start of the Swarm War, Leia unknowingly became a grandmother through Jacen's daughter Allana.

One of the most important figures in the Galactic Civil War and the New Republic, she could have been simply another galactic denizen had she not been adopted by Bail Organa. Politician, fighter, and spy were the roles that awaited her instead. She had a forceful personality and bright intellect, having accomplished much in her youth: she was a strong proponent for the Rebel Alliance, the youngest Senator ever of the Galactic Empire at eighteen standard years of age, and a member of the Royal Family of Alderaan. Years later, she was elected Chief of State of the New Republic and served twice in that office.

Though raised in the privileged surroundings of a peaceful planet that had banished weapons from its culture, the times were dark and this fiery diplomat received martial training in order to defend herself, both with a blaster and just her bare hands. She would use this training in the numerous wars and other conflicts that shook the galaxy during her lifetime.

Due to her powerful Force heritage, Leia, following her family's legacy, became a Jedi Knight in the New Jedi Order, partially trained by her brother Luke and later by Saba Sebatyne, who declared her a fully trained Knight at the end of the Swarm War. This training would serve her well as the galaxy teetered on the edge of collapse into civil war once more during the Second Galactic Civil War, although it complicated her allegiance. During this conflict, Leia's son Jacen turned to the Dark side of the Force, becoming the Sith Lord Darth Caedus. Leia and Han became determined to destroy Caedus, feeling that their son was already dead. However, it would be their daughter Jaina who ended his life in a fierce lightsaber duel, that also concluded the war.