They kind of remind me of the symbol that was drawn in blood at the lounge.

[ he glances at kaito when he says this, considering the two of them..... played catch with a pencil.... while surrounded by blood and a cryptic message from the ghost.... at least yukina wasn't there to see that. ]

Whatever it is, hopefully we can kill it. Kaito, you can only use one of your bullets, since the rest are for the Prophets. But that should be a last resort in case Yukina and I can't kill whatever it is.