Libra symbolizes scale, being the only sign that represents an instrument and not a human or animal figure.
Libra: Hera, Goddess Of Women And Marriage
For this reason, in the Olympic scheme, Libra was ruled by Hephaestus (the blacksmith and artisan of the gods). Olympic rulers were arranged in pairs of male and female opposites. Hephaestus makes a pair of opposite to Athena (who ruled Aries). Athena was born from the head of Zeus, without female intervention, and Hephaestus was born from Hera , without male intervention. He is partner to Aphrodite (Venus), current conductor of Libra.
In Venus , your current conductor, we have Libran love, which involves recognizing the needs of the other.
Even so, astrologers question the current rulership of Venus, suggesting asteroids like Juno (Hera) as ruler of this sign, as she was the goddess of Greek marriage. And Libra is much more for marriage than it really is for love. Despite Libran romanticism, this is an air sign, mental, cold and dry.