Joey started out as a bully, but becoming friends with Yugi Muto changes this. Joey can seem gullible, sarcastic, impulsive, and occasionally cocky; but he is also heroic, loyal, bold, kind-hearted, caring, good-natured, funny, brave, selfless, and loving. Though portrayed as comic relief, he is essential to the plot and the series' overall theme. He is an enthusiastic Duelist, who firmly believes that Dueling is about fighting to help the people you love. Joey profoundly cares for his sister.