Primary

• Yami Yuugi Alter Ego of Yuugi Mutou
• Yami Yuugi Rival of Seto Kaiba

Extended

• Yuugi Mutou Grandson of Sugoroku Mutou
• Yuugi Mutou Best friend of Katsuya Jonouchi
• Yuugi Mutou Friend of Hiroto Honda
• Yuugi Mutou Friend of Anzu Mazaki
• Yuugi Mutou Alter Ego of Yami Yuugi
• Seto Kaiba Adoptive brother of Noah Kaiba
• Seto Kaiba Older Brother of Mokuba Kaiba
• Seto Kaiba Adopted son of Gozaburo Kaiba