She-Ra is a fictional character and the protagonist of the Filmation cartoon , debuting in 1985. Also, a series of toys under her name were produced by Mattel. She is the alter ego of Princess Adora and the twin sister of Prince Adam/He-Man. She-Ra was intended to appeal to young girls in the same way that He-Man appealed to young boys. Filmation writer Larry DiTillio created the backstory for the property.