In the anime Haikyuu!!, mentorship plays a significant role in the development and growth of the characters. The show emphasizes the importance of having experienced individuals guide and support younger, less experienced players to help them improve their skills and reach their full potential. Through mentorship, characters like Hinata and Kageyama receive valuable advice, motivation, and training from their coaches and senior teammates, ultimately helping them grow both as athletes and individuals. Overall, Haikyuu!! portrays mentorship as a key factor in fostering personal and professional growth in the world of competitive sports.