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 the Saints of Athena, as a sign of respect, even though his only true student is Shiryu.