Headmaster

The Headmaster is the head of the Royal Tennis Academy and chairman of the Island Open in Mario Tennis for the Game Boy Color and Mario Power Tennis for the Game Boy Advance.

In Mario Tennis, Alex or Nina first arrives at the academy and get bumped by the Headmaster who then apologize, welcomes the new student and then departs. After Alex/Nina has completed the Varsity matches, their roommate/partner inform them to head to the Headmaster's office. Inside the office, the Headmaster congratulate the player for their achievement amd wish them good luck at the Island Open, the Headmaster escort Alex/Nina, Emily, Kevin, and Mark to the Island Open. When they arrive, the Headmaster give them an auspicious remark, and heads back to the Academy. During the time in the Island Open, the player can visit the Headmaster inside his office. He later appear at the ceremony given out the trophy to winners for their success in the tournament. After the ceremony, the player meets the Headmaster inside his office who notify them that Mario has invited the player to a match at his World.

In Mario Power Tennis, he is first seen talking to Alex after the mysterious masked players came. He also comes to take Clay, Ace, Elroy, and Tori to the Island Open in doubles mode. When they first arrive at the Island Open, the Headmaster burns from the heat. His assistant, Samantha, pours a buck of water on him to cool him down. After playing in the "Mario World", the player can visit the Headmaster in his office in the main building. Headmaster wears a green suit with a red tie. He has black hair and a small mustache.