Sailor Galaxia... my favourite villain of all...
=). I'm going to save you the usual spiel about legends and whatnot and
get to the point. Galaxia was once the most powerful Senshi ever. She killed
the evil Chronos by absorbing him into her body. Unfortunately this caused
her to become spoiled and rotten... like a fruit with a disease in it's
core. Thus began her rampage across the galaxy to collect star seeds. In
the Anime she sends out her own star seed, ChibiChibi, to find the light
of hope. In the Manga she does not do this... but still tries to take over
and kill everyone one. Then along comes Usagi who saves the day and Galaxia
leaves with all the star seeds to reincarnate them and everyone lives happily
ever after until the next villain comes along.