Lance, within the painting, saw the two demons who appeared on the ship and then looked up at the naive human head of his young dragon, chuckled lightly, waved to the dragon, signaling that he was aware.
It seems the dragon cub wants to match wits and strength with its true form.
He realized that for now, the dragon cub does not want to be found by its true form... and the true form... probably doesn't know yet that its dragon cub could transform into a human.
"You are... Lance Demon Lord?!"
Great Demon Augustus, looking at the human in front of him, unknowingly spoke with respect.
"You two... oh... four of you, why did my dragon cub send you here?"
"Your Highness was afraid we would return to the Abyss, revealing her whereabouts to the Demon Lord, so... she sent us here."
