Thinking on it, I've decided what enemy I want added. "Shadows". They take the form of a player at random out of the party that attacks them, with full access to that player's skills and stats. They also fully take on the appearance of that player, but in a black/grey form without color. As for appearance, it could copy the player model in the same way that cutscenes do, (you can still see a player standing around when they're watching cutscenes, but they can see themselves doing stuff within said cutscene, so it's possible), and the only real issue would be to copy all the skill and stat combinations. If you face one solo, then you're having the classic "fighting yourself" moment that takes place in a few FF games, which is always fun, and if you're in a group, then it can prove a challenging fight to take on people with the same skills as your party members, (possibly use the PvP versions of the skills though if they're considered too difficult to fight)......