As the first zodiac sign, Aries are natural born leaders. It is fitting that their symbol is the ram's head, as they charge forward without fear. They are a fire sign, which shines through in their determination and sometimes aggressive nature. Their cardinal quality also makes them very ambitious. Ruled by Mars, the planet of action and the God of War, Aries are confident and enthusiastic leaders. The color red perfectly represents the 'fire' behind all Aries.