Gemini is both castor and pollux merged into one body, they were a astro-body until they got fired and forced to go down to earth. They don't know much about emotions but lunar has said that he likes them and they are deciding if they should date him or not, but so far they think yes, pollux is female and supper exited about stuff and castor is male and has a monotone voice and doesn't really get excited, they are siblings and they were training lunar to use his powers but is still trying