Yugi Mutou is the main protagonist of the 'Yu-Gi-Oh!' series. A kind-hearted high school student, Yugi is known for his love of games and puzzles. After solving the ancient Millennium Puzzle, he becomes host to the spirit of a mysterious Pharaoh, which transforms him into a confident and skilled duelist. Throughout the series, Yugi uses his intelligence, bravery, and strong sense of justice to face various challenges and protect his friends, playing a central role in the story's major conflicts.