Together with the spirit of Pharaoh Atem, he holds the title "King of Games" (King of Duelists in Japanese version)
Yugi possesses the three thousand-year-old (five thousand in the dub) mystical Millennium Puzzle, which allows his body to bear host to the spirit of the Puzzle, Yami Yugi. Yugi was initially unaware of his existence and control of Yugi's body, and would involuntarily shift to Yami Yugi at trying times in the English dub.
Yugi is part of a close-knit group of best friends: Joey Wheeler, Tristan Taylor, Téa Gardner and Bakura Ryou. Yugi's friends often cheer him on from the sidelines, and Joey has Dueled at his side. Yugi has been friends with Téa since childhood and has a romantic crush on her. Téa has been shown to have romantic feelings for both Yugi and Yami Yugi.