Son

The Son, was the incarnation of the dark side of the Force who resided in the realm of Mortis with his family—a dynasty of immortal Force-sensitive beings who transcended the physical plane of existence. Like the other members of his family, the Son was a shapeshifter who possessed the power to transform into a winged creature that personified his connection to the Force.

Together with the Daughter, the embodiment of the light side of the Force, the two siblings shared a mutual enmity for each other and a rivalry that mirrored the two opposing sides of the Force. The Son longed to escape into the galaxy, but his ambitions were hindered by the Father, who sought to permanently bind his children to Mortis where he could maintain balance between the two. During the Clone Wars, a civil war fought between the Galactic Republic and the Confederacy of Independent Systems, the Son saw an opportunity to undermine the Father's rule with the arrival of Anakin Skywalker, the prophesied Chosen One. In his desire to escape Mortis, the Son masterminded a plot to turn Skywalker to the dark side as he believed that only the Chosen One could release him from the confines of Mortis. As a result of the Son's actions, Ahsoka Tano was briefly corrupted but the Padawan learner's fall to the dark side failed to turn Skywalker as he and Obi-Wan Kenobi refused to harm the young learner. Instead, the Son fatally wounded his sister when he attempted to kill the Father with the Dagger of Mortis, an unintentional act that he came to regret.

Despite the loss of his sibling, the Son proceeded with his plan to leave Mortis. Through the Son's ability to see the future, Skywalker foresaw a series of events—all directly connected to his imminent future, joining forces with the Son in order to end the war. When the Father erased the young Jedi's memories of the visions so that the future would proceed without alteration, the Son, once again denied of the chance to leave Mortis, fought with his father and the Jedi in a final confrontation. Much to his horror, the Father's suicide robbed the Son of his immortality, allowing the Chosen One to kill the dark one.

Text and facts from the “Son/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.