Brock, Eno and Vincent were standing mere meters away from the Demon tier beast that looked like a Dragon. Initially, they had been unsure if it was going to attack them or leave them be, as it had just continued staring at them, but once it had let out that almighty roar, they all understood that none of them were welcome anymore.
When Quinn had gone up to the tablet, Vincent was unable to hear the voice on the other side, but he could hear what Quinn was saying. It sounded one sided but he could guess the words that were being spoken and Quinn often updated him on what was happening as he wanted a second opinion.
However, for the first time, Vincent had heard the voice, and knowing that it didn't come from the other two with him, he was certain that it had come from the tablet itself, meaning it had come from the one that Quinn had called Ray.