The carriage was extremely quiet, and with Shard's superior physical condition coupled with the enhanced hearing from the "Echo of the Past" in a Divine Afterglow State, he faintly heard a few words in Carsonrick, although not very clearly:
"What are they saying?"
Maid said: Your Highness, MI6 agents have been spotted around the station.
"Hmm? How can you hear that?"
Murmurs continued beside his ear:
When you can see a direction unseen by others, is it that impossible to hear sounds others fail to perceive?
"She" made a fair point, and since Shard had heard part of the voice himself, it made sense that the "other me" with a stronger perception could hear even more:
"However, MI6 is actually...wait? Your Highness?"
His eyes widened slightly, though his expression did not change as he said:
"Your Highness, you need not use formal language with me just now."
Then he followed up with a question:
"Also, has something happened?"