In Umamusume Pretty Derby, mood significantly influences training and racing performance. Maintaining a positive mood enhances training results and race attributes, while a negative mood diminishes them.

Using the Infirmary is simple: If the Infirmary is lit up, it means your Umamusume has a recoverable condition. She gets checked up, and the game attempts to remove the debuff. She also regains a little energy, even if the condition doesn’t fully clear right away.