She-Ra: Princess of Power is an American animated television series produced in 1985 by Filmation, the creators of the He-Man cartoon. She-Ra was aimed primarily at a young female audience to counterbalance He-Man's popularity with young males. Unlike the He-Man cartoon, which was based on the Masters of the Universe toyline by Mattel, the creation of She-Ra was a collaboration between Filmation and Mattel. The initial group of characters and premise were created by Filmation, while the characters introduced were later designed by Mattel. Mattel provided financial backing for the show, as well as an accompanying toyline. The series premiered in 1985 and was cancelled in 1986, after 2 seasons and 93 episodes.
The show follows the adventures of Princess Adora, Prince Adam/He-Man's twin sister, who leads a group of freedom fighters known as the Great Rebellion in the fight to free Etheria from the tyrannical rule of Hordak and the Evil Horde. With her Sword of Protection Adora can become She-Ra, just as Prince Adam can become He-Man.
Born on planet Eternia to Queen Marlena and King Randor, Princess Adora is kidnapped at birth by Hordak and taken to Etheria. There she serves as a mind-controlled Horde Force Captain before He-Man rescues her. After reuniting with her parents on Eternia, She-Ra decides to return to Etheria and lead the Great Rebellion.