In the fifth-season episode "A Single Pale Rose", Rose Quartz is revealed to have originally been Pink Diamond, the Gem leader overseeing the Gem colonization of the planet Earth. Originally immature and believing herself undervalued by the other Diamonds, she was made miserable by the strict expectations placed on her by her status as a Diamond. She created the alternate identity of Rose Quartz to alleviate her boredom while running the colonization of Earth and ended up falling in love with the diversity of the planet's life and the possibilities that came with it. Unable to protect the life on Earth any other way, she used her new alternate identity to lead the rebellion to protect the planet, and eventually faked her own assassination to break free from her former life.
