Houou Byoudouin

Hōō Byōdōin is introduced at the U-17 Camp in Shin Prince of Tennis ranked as the Number 1 ranked Youth Representative of Japan, which marks him as Japan's best U-17 player. He is the leader of the First Returning 1st Stringers, who have just returned from an Overseas Expedition.

They get back to the camp to be welcomed back by the news that middle schoolers have joined the camp and witnessed them defeat a number of the Top 20. He decides to allow the inclusion of middle schoolers on the list of challengers for their places.