Yami Yugi is revealed to be the spirit of the Egyptian pharaoh Atem. Atem not only resembles Yugi Muto but also may have been his progenitor. The series hints that Yugi is the modern version of Atem.

The Pharoah, Atem, Yami Yugi, was revealed to have hidden darkness during the duel against Rafael, the strongest of Doma's ...