Libra Dōko
Libra Dohko (天秤座の童虎, Raibura no Dōko) is one of the Gold Saints. He is one of the oldest characters in the manga next to Aries Shion, as they both appear in the previous Holy War, and is most known as Dragon Shiryu's mentor. He is also referred to as the Old Master (老師, rōshi) by all of the Saints of Athena, as a sign of respect, even though his only true student is Shiryu.
Dohko's guardian constellation is Libra, and his Gold Cloth represents it and its associated myth: The scales held by the goddess of justice Astraea. The temple he once guarded was known both in manga and the anime adaptation as Ten Bin Kyuu (天秤宮), the "Temple of the Scales."
As Masami Kurumada revealed in his sidestory prequel Saint Seiya Next Dimension, Dohko was originally a Bronze Saint and was awarded the Gold Saint status and the Libra constellation later. Thus, the original guardian constellation Dohko bore is yet to be revealed. He is also one of the main characters in the Saint Seiya: The Lost Canvas sidestory prequel. Since the two prequel exclude each other, which one is canon is unknown.
Unlike most of the Saints, none of the attacks he uses takes the form of his constellation, but instead take on the form of a dragon, similar to Shiryu. Even more unusual is that his symbolic creature, seen when his draws his full power, is neither the Libra nor a dragon, but a tiger.
Masami Kurumada used in his manga the Chinese concept of the duality of the tiger and dragon, in his characters Dohko and Shiryu. That's the reason for tiger and dragon images that appear on their backs when they burn their Cosmo.
Saints Group : gold-saints