When Sawamura Daichi, Sugawara Koushi, and Azumane Asahi inherited the Karasuno Boys’ Volleyball club, it had reached it’s lowest point.
Almost every major character in Haikyuu!! has what I call a “witness to growth”. Some have more than one. Hinata as the main character has almost every other major character as a witness, but even he still has a single primary witness.