We've all heard that Gemini is the sign of the twins and that these people have trouble making up their minds. Not really true. Here are some tips if you want to give your character a Gemini Sun, Rising Sign or Moon.
Gemini sun and this is the inner nature of the character. Geminis are ruled by Mercury, This means communication. Geminis are sympathetic, affectionate. Home and children mean a lot to them. One of the problems they have is being easily influenced by people who are kind to them. Geminis are intuitive and are good investigators. They can act quickly in an emergency. Another problem is that they can be changeable. They are also inquisitive and love diversity.
Rising Sign- the face shown to the world. Ambition often rules. They are curious and given to investigations and experiments. With this sign rising they are capable of two pursuits at the same time, even to having two careers and the drive to succeed in both. They can be idealistic, perceptive and imaginative. A love of pleasure can set them on a tangent. They can be restless and high strung. They are great talkers.
Moon -- The emotional nature. This side of a Gemini shows an agreeable, warm-hearted persom except they are reserved about personal and domestic matters. They gain pleasure from books. With a Gemini Moon, the character would dislike quarreling and warefare. They are also changeable. A real problem can be caused by being drawn into embarrassing or difficult situations.