"I am TATSUAKI, THE (third) BEST TENNIS PLAYER. And apparently, some kids say I am really "cool" and I hate kids because they are annoying."
Tatsuaki is a hot headed, easily agitated but strong hearted sportsman. He has lots of skill but his anger issues can usually be what leads to his fall back. A lot of people think he is "cool" just because of how he hangs around the back and tries not to draw attention to himself. It's what usually gets him mad, when all eyes are on him.