Your sister sign is the sign that’s opposite yours on the astrological chart. Aries is the first sign in the zodiac and libra is the seventh. Your sister sign has polar opposite elements and traits. You sometimes find yourself drawn to your sister sign throughout your life, but sometimes you find that you can’t stand them. Aries tackle everything they do with tenacity, reacting quickly and making decisions fast. Libras are balanced and take time with their decisions, weighing each option carefully. Aries can learn to be more level-headed from Libras, while a Libra may learn how to state their opinion more often from an Aries.