Air Signs (Triplicity) – These 3 signs are hot and moist by nature and sanguine by temperament. Libra (cardinal), Aquarius (fixed) and Gemini (mutable). They represent the intelect, communication and writing skills, education, perception, impression, relationships, others, publicity, audience, public affairs, popularity, fame, groups and communities, travels, pilgrimige, spiritual growth, movement and dynamic.