So he's conscious, he just can't do anything to resist now that Naito's decided to make him the twist villain, huh? Well, that at least confirms that they really are "real" beyond just being characters in Naito's story. Maybe it's also suggesting that he'll be saved and go back to normal? Because it's establishing beforehand that he's not all gone. Alternatively, maybe it means he'll be conscious enough to sacrifice himself or something. (Though he literally did just do that...)