Alexander the Great

Yu-Gi-Oh! Capsule Monsters reveals that one of the past owners of the ring was Alexander the Great. The item brought him many victories, but began to twist and corrupt him, likely the influence of the spirit of the ring, although outright possession was never confirmed. Alexander's soul was also split by the Ring into two halves: one evil, one good. Alexander lost the Ring (to Shadi, it would seem) after failing a trial to prove he had earned the right to use the Ring, and it continued to wander throughout history until it eventually wound up in the hands of young Ryo Bakura, a gift from his father who acquired it on a trip to Egypt.