Dex acts very arrogant and boastful. He cares very much for Chisao, often panicking when he gets in trouble, and tries to maintain his respect in both the games and the anime. He also has a rivalry with Lan and the two compete whenever they can, usually by NetBattling. He and Lan are similar in that they forget to do homework and do poorly in class. Dex also gets very mad when Mayl hugs Lan or shows any kind of affection for him at all. Dex cares deeply for his friends and is willing to risk his life for them. Dex has also been known to get emotional, like when he was going to move away to Netopia in Battle Network 3.