"No, Sade! You're only three years old. You're still way too young.
"The human world is a terrifying place and with powers like yours, I'm afraid that I'll have to find my way through the slave market just to bring you back."
Hearing Prescott's words, Sade felt that Prescott was making a mountain out of a molehill.
Previously when Sade met Philomena, he had carefully observed her clothing choice and undoubtedly, these clothes were similar to the ones that were being worn during the Medieval age of Europe. After he learned the common language of the continent, he intended to learn more about the human world from Philomena.
Based on the explanation from Philomena, the human world was similar to what he had imagined. The social structures of the human world were indeed still similar to the Medieval age.