Yugi loves to play and solve games. Yugi lives with his grandfather, who manages a gaming shop. His grandfather introduces him to the ancient Egyptian "Millennium Puzzle". After Yugi unlocks the puzzle's secret, his life changes. He becomes Yami Yugi, a powerful spirit and starts to duel with many rivals. He'll fight with opponents, sometimes even while playing by their rules, and, of course, beats them at their own game. Since Yugi is shy and kind in his normal state, he is lucky to have some strong friends like Joey, who is possibly his best friend, Tristan, and Téa.

Yami Yugi

The alter ego of Yugi. Using the Millennium Puzzle, Yugi is filled with magical energy, which makes him more powerful and a master duelist.

Kaiba

Seto Kaiba is rich. He can't live with the fact that Yugi beat him. His ultimate goal in life is to beat Yugi using whatever means necessary. Kaiba has a younger brother named Mokuba, who shares Kaiba's passion of gaming. When Kaiba and Mokuba were raised in an orphanage, Kaiba promised Mokuba that he would take care of them no matter what. Even though Kaiba is the wealthy CEO of his own multinational high-tech corporation, KaibaCorp, his real passion lies in the world of Duel Monsters. There, he uses his ruthless business drive to overcome any who challenge him. He is an expert in the art of dueling and challenges Yugi as a rival.