Alright, obviously,
Sally was
not in fact killed by the Metamorphs.
And
Eomer appears to have been one of the secret roles? I don't know what his role was supposed to do, but given that we have an Assassin that hunts the Metamorphs with a special gun, and
Eomer had a special gun in the narration, maybe he was the counterpart to whatever killed
Sally?
Speaking of, it's looking like we may, in fact, have a werebear. Which immediately makes me suspect
Rikae, obviously.