Castor and Pollux are twin female youma under the control of Nephrite in episode 021 (Protect the Childrens' Dream! A Frienship Tied by Anime). Because they were Nephrite's strongest youma, their primary mission is to help him defeat the Sailor Senshi. The other part of their mission is to gather the energy of the young animator Hiromi Matsuno once she reaches her peak energy output. Castor has orange skin, red eyes, light brown hair, and a red forehead marking. She wears a magenta outfit. Pollux has blue skin, blue eyes, light blue hair, and a yellow forehead marking. She wars a turquoise outfit.
(Source: The Oracle :: BSSM Encyclopaedia)
