

30 minSeason 1 • Episode 52
LatestPrincess Sapphire is a girl raised as a Prince. Through the mischief of an angel, the princess is born with both a girl's and a boy's heart. Since there is no boy successor in her kingdom, Sapphire is raised as a boy, but evil ministers try to reveal her secret. Unable to put up with the kind of vicious conduct prevailing in the kingdom, Sapphire disguises herself as "Princess Knight" and wields her sword of justice.
Production
Osamu Tezuka's fingerprints on every frame.
Costume
The Princess Knight disguise: iconic, ridiculous, perfect.
Trivia, insights & behind the scenes
This is widely considered the first shoujo anime, essentially inventing the genre's visual language and narrative tropes. Revolutionary doesn't cover it.
Tezuka allegedly created Sapphire after his daughter asked why girls in stories couldn't be heroes. The 'two hearts' device was his workaround for 1960s censorship.