Castor is one of the two Gemini twins. His sisters name is Pollux. He's not from planet earth and is from space. Is actually a star but alive. Is as small as Lunar. Is dating Lunar. Has powers such as : size changing, teleporting into the dreams of others, telekinesis, flight and more. He has fuse with his sister and make a taller person named Gemini that's basically them fused. He's very serious, very grumpy, emotionless and tired but deeply he cares and just wants everything as if should be.