Villains was a tough thing to go by to begin with because in XIV's case, there is a tone of them and the main ones are a precursor race that is trying to restore their old world at the cost of the current one. Amet Sech gets a lot of lip service in fan videos I found, but there are a few other people involved not even counting other figures.

P3 is also tough because it has three set of villains but overall, the real threat to humanity is itself and its desire for self destruction. So while I posted one with Strega or talkign about Nyx, the reality is that it's humanity itself that's the villain for those who never played P3.

So yeah, 'villain' is not an easy concept for either game.