She-Ra: Princess of Power (1985)

He-Man's twin sister got the better premise. Instead of guarding a castle, She-Ra leads the Great Rebellion against Hordak and the Evil Horde, so the stakes feel closer to a war story, and the supporting cast of rebels gives it more warmth than its parent show. Start with the film The Secret of the Sword, which introduced her and was assembled from the series' first five episodes, though it came out before the series did. After that, the episodes work in any order.