Sakuno Ryuzaki is a fictional character from the anime and manga series Prince of Tennis. She is a shy and timid girl who has a deep admiration for tennis, particularly for the talented player Ryoma Echizen. Sakuno often struggles with her confidence but is determined to support her friends and improve her own skills. As the granddaughter of Ryuzaki Sumire, the coach of the Seishun Academy tennis team, Sakuno is often seen at the tennis courts, cheering for the players. Her character represents the theme of perseverance and the importance of friendship in sports, making her a relatable figure for many fans.