There's five of them, and we officially caught two so far, with Serph and Battler. If Vriska is one, then that means there's only two left.

[ at that last question, though... ]

You really do like asking questions that I don't know the answer to. If the game doesn't end, then... we'll have to find another way to end it. But just because there's a possibility it won't work out, doesn't mean we shouldn't try.