Pretty Derby, trainers can unlock signature racewear for their horse girls by increasing their star rating to 3-stars. This is achieved by acquiring Star Pieces, primarily through scouting duplicates and exchanging Goddess Statues.

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.