It's said in earlier chapters that her glasses are detection warding glasses, which only hides about 51% of her evidol charm, so it makes sense that Mr. Hat gave her detection warding glasses as he knows of her evidol personality, so it would also make sense that she would take her glasses off."Evidol Mode" ... i.e. Taking those insufficient glasses off entirely and becoming completely fucking plain. It is like committing seppuku. Turning the appeal down to zero. Between that and slaphead, that choice of action might as well have been waving a white flag of surrender.