Yugi is kind-hearted and child-like. He is good at games, riddles, and puzzles, especially Duel Monsters. As Shadi stated when he looked into Yugi's Soul Room, he has no malice or wickedness in his heart. This doesn't mean he cannot get angry at someone, but is willing to forgive them.
Yugi is also very shy when comes to meeting people who admire him, especially girls. As seen with the cases of Mai, Vivian, and later Rebecca, he would often blush and even freeze up when they approached him. 