''Despite the differences between the two clans, humans and demons are familiar with each other's ways to some extent. If spices and herbs can be smuggled from the human realm and brought here, then it is not difficult for folklores or songs to be passed around as well," Even though her words were vague but the implication in them was crystal clear.
"That cannot be a human,'' Azrael's statement backed up her theory.
After the war, the barrier separating both realms have been perfected to an extent where one could not breach them. And no matter how skillful, a human would not be able to survive under the sensitive noses of demons for long. Even Lareina had a spell casted on her to retain her human scent.