Hi again.
One of my idols is, um, very... very depressed.
How this happened was that she had 52 physical stamina, and I took a photoshoot job that cost 51 stamina (I specifically chose her because she had the stamina). Unsure what her mental stamina was before that, but I do know it wasn't low.
Edit: Oh! When I closed and reloaded the game due to the bug below, her mental stamina was changed to 0.