The royal palace's staff was divided into two parts. A part who believed that the royal family was full of sacred beings who made sure that the empire flourished. They have faith and devotion to the members of the royal family and believe in serving them to the best of their abilities.
And others, who know the truth. Those who work as personal maids and knights of members of the royal family and do their dirty work. Either it was spying on other families, stealing or killing. They would not hesitate to jump in the burning house to get some secret out.
They were paid well and a better life was assured to their family. Like a chance to get education, manor, gold and gems and land.
But there was another small ground of men and women from orphanages who were adopted by Luke. The man who was known for his kind and warm nature but stern personality.