Killed 8 ghosts

“There won’t be any more girls hitting the pavement for a while after
the eighth, ‘least not ones related to these incidents.” Shiki, now standing
beside the window, joins the conversation.
“How could you possibly know that?” I say.
“How else? I checked. There were eight of them floating around that
building. I took care of ‘em, but they’ll be there for a little while longer,
even if it does make me sick.” Shiki faces away from the window, posing
with arms crossed.

“Apologies, Kokutō. We’re talking about the ghost at the Fujō Tower. I
don’t really know if it’s the real thing or just some mage’s illusion. I wanted
to check, but if Shiki really killed it, then there’s no way to know for sure
now.”
So it was about that. The conversations between Shiki and glasses-offMiss Tōko are always about the occult and the magical, so it wasn’t that
hard to guess anyway.
“You know that Shiki saw those girls floating around in the Fujō Tower,
correct? Turns out there was another human figure flying around among
those floating girls. Since they couldn’t be removed, we figured perhaps
that place was something akin to a net to them, or something along those
lines.”

Part 1, page 18