Bakura Ryou

Bakura Ryou, known as Ryo Bakura in the Japanese version, is a recurring character in the Yu-Gi-Oh! anime. He is a classmate and friend of Yugi Moto. He is the modern-day counterpart to Bandit King Bakura.

Yami Bakura
Yami Bakura is his other self, released from the power of the Millennium Ring. The two rarely directly converse. Unlike the close, cooperative relationship between Yugi Moto and Yami Yugi, Yami Bakura is a malignant entity that completely suppresses Bakura's spirit when he takes over.

Trivia

 * A few months after Zorc the Dark One was gone forever, a new spirit inhabited Bakura's Millennium Ring; Bandit King Bakura himself, who became anti-hero after saving Atem's life from Junko Enoshima.