Sailor Galaxia - Yenra Picture Wiki
Sailor Galaxia (セーラーギャラクシア Sērā Gyarakushia) of Sailor Moon is the main antagonist of the fifth story arc appearing as Sailor Moon's strongest opponent.
She is the self-proclaimed "Golden Queen of Shadow Galactica", and is also described as the Soldier of Solitude.
She aims to discover all the Sailor Crystals in the universe so that she can rule the universe unopposed. Galaxia's own crystal, the Saffer Crystal, is described as one of the most powerful Sailor Crystals in the galaxy. Its name is Old English for "sapphire," and the kanji applied to it in the text of the manga are 青金石 (seikinseki), meaning "lapis lazuli."