Mephisto replied with a nod alone, and listened to Ariel, while the bird hopped from one of his shoulders to the other to get a better look at what was going on. He didn't much care for the sound of the larger explosion, but he was growing anxious. He half-wondered if he'd have to shed his mortal form and show Ariel his true form for this to work.
All the while, he watched through the bird's eyes, and was positively riveted. His surrogate eyes were transfixed by Ariel's movements, by him holding the skin. The bird was absolutely silent, and Mephisto considered offering his own always-steady hands for this process, because Ariel was prone to shivering at his presence.
Again, it made him almost feel like his lighter self, to be in sight of such amazement.