Mu di Aries is the Gold Saint of the constellation Aries in the anime Saint Seiya: Soul of Gold. He is of Tibetan descent and is known for his quiet, graceful, and peaceful demeanor. Mu is considered to possess the strongest raw psychic talent among all living Gold Saints, a power that manifests in abilities such as psychokinesis, teleportation, telepathy, and clairvoyance. He is the only saint who maintains the traditional art of repairing Cloths, using rare materials like Gammanium, Orichalcum, and Star Dust Sand to restore damaged armor at an atomic level. His signature defensive technique is the Crystal Wall, an invisible barrier that can block and repel attacks, while his offensive techniques include Starlight Extinction and Stardust Revolution. Mu is also capable of light-speed movement and can fly at faster-than-light speeds in space. In the story of Soul of Gold, Mu is briefly resurrected by the Norse god Odin alongside the other deceased Gold Saints. He plays a key role in the battle against the evil god Loki, contributing his psychic abilities and strategic insight to help seal Loki and protect the world of Asgard. His motivations are driven by loyalty to Athena and a desire to uphold justice, even as he maintains a calm and calculated approach. Key relationships include his deep respect for Libra Dohko, whom he calls Sage, and his friendship with Taurus Aldebaran. He is also the disciple of Aries Shion and the master of the young psychic Kiki. Over the course of the series, Mu remains a composed and rational figure, trusting his intellect and psychic powers over brute force, and he stays dedicated to the cause of protecting Athena and her saints.