gpt
Subaru:  "Mr. Natsuki! There’s some black-winged mice in front!"
human
Subaru:  "Whoa!" While Subaru was deep in thought, some black shadows had flown toward him in the moonlit corridor and were already right before his eyes. These were demon beasts with round bodies, about the size of puppies, that resembled flying mice with black, bat-like wings. Two of the creatures, worthy of the name black-winged mice, aimed their sharp fangs at Subaru.
gpt
Petra:  "Go away! !" Petra raised the repel stone aloft, instantly driving off the black-winged mice.
human
Subaru:  "You saved my bacon, Petra! …But this means the stone isn’t completely ineffective, doesn’t it?"
gpt
Petra:  "Against normal demon beasts, it works just fine! For the moment, it is ineffective only against a single demon beast. So long as that beast is not…"
human
Subaru:  "Meaning that one is—" Special, he was about to say, but two things happened before he could—the sound of an impact ringing out, followed by high-pitched death cries. From the back of the corridor, in the darkness where the moonlight did not reach, a monstrous claw flashed, drawing out screams and fresh blood simultaneously. The fearsome blow tore the wings off the black-winged mice, leaving them helplessly falling and rolling onto the carpet. Pitch-black blood coursed from their wounds as the two demon beasts convulsed. An enormous maw reached forward to snap up their bodies, chewing on them. The murderous sounds of snapping bones and bloody flesh being consumed reverberated across the corridor.