I'm just thinking out loud, which sometimes happens when you're with thoughtful people. But you wouldn't understand...
KOSHA, spirits cannot be evidence. They are given based on the profile. Is there really no better evidence for a female role? Considering that there was a similar piece of evidence in the third game, and that I used spirits to reveal the female role in my Mafia game, and the player was a woman. I think the same thing is happening here.