Pharaoh 90

師・ファラオ90

Master Pharaoh 90 (師・ファラオ90, Masutā Farao 90?) is a malevolent alien from the "Tau Ceti Star System;" further details regarding its origins remain unknown. It manifests solely as a massive black sphere with tentacles.
In the manga, Pharaoh 90 aims to merge with Earth and claim it as his home. In the anime, its objective is merely to destroy the planet by initiating the Silence. Pharaoh 90 is the entity that gave the daimon egg of Mistress 9 to Professor Tomoe, exploiting Tomoe's wish to save his daughter. In truth, Pharaoh 90 simply required a vessel for Mistress 9 so that she could, in turn, open a portal for Pharaoh 90. In the anime, Sailor Moon and Sailor Saturn destroyed Pharaoh 90, whereas in the manga, Saturn drove it back to Tau Ceti, and Sailor Pluto subsequently sealed it away forever.
Like all the primary antagonists in the manga, Pharaoh 90 is later revealed to be an incarnation of Chaos, the series' ultimate enemy.