Oh? So you were not present when they first appeared?

Well, you deserve an explanation, aru. [He tucks a stray black lock behind his ear.] They are monsters who skin their victims after killing them, so they can put the skin on themselves and pose as the person they just killed. Sometimes their acting skills are nearly flawless, which makes them even more dangerous.

Before they attacked last time, they watched everyone. ...They might be here, it is possible since we never knew what became of the ones who survived.