I'm looking for a movie that I saw on TV in the late eighties/early nineties. In this movie there were spaceships and two sisters (just like in 'Swan lake') named Odile and Odette; Odile was pure and good, whereas Odette was evil. Odette's spaceship was shooting Odile's spaceship because she were trying to kill here or steal anything from her, I really can't remember.
Also I remember something like three magic crystals, or crystal-hearts, or something like that.
It seems impossible to get a clue about this movie but I swear I saw it for real, it was not a dream haha.
Thanks in advance everyone.