"Is that what you were doing," from up above, as Mobius hauls himself down from the upper levels, studies (increasingly fruitless) into envy demons forgotten. He doesn't, for whatever it's worth, appear to be armed. "Because it sounds like you were causing a whole ruckus in my library. And after I told everyone to knock it off just recently, too."

He sees, as he makes his way down the stairs, the situation starting to unfold, and Abby's presence is at least going to help in wrestling (or killing) a demon wearing Edgard's face. Maybe if they surround the damned thing, it won't know where to strike.