Sailor Galaxia is the strongest Sailor Senshi known in the galaxy, and for a time was one of the most dangerous forces arrayed against life living and love. After initially defeating chaos, she sealed it inside her body and eventually became a villain, wrecking a path of destruction across the galaxy collecting the starseeds of other Sailor Senshi.
Her plans with the Shadow Galactica were foiled by Sailor Moon in 1995, when the latter encapsulated the planet Earth into a dream; through the intervention of the Ten'ou House regulars, Galaxia was defeated for realsies in the Infinite Crisis of Suburban Senshi.
Galaxia was turned into a peace-loving space hippie when Usagi purified her from the Chaos within. She has taken to touring the galaxy, leaving the Sailor Crystals she took behind at Galaxy Cauldron, where the revived Senshi have formed the Sailor Corps.