"You're alright," said Klaus, offering Claude a warm smile as he knelt on his knees while the little prince was sitting on the edge of the bed. "That madwoman won't do anything to you. Just… just… stay here for now. This place is safe for you."
Klaus ruffled the young boy's hair in hopes that would comfort him a bit. Being back in time and staying in the royal palace was not the best time for the two of them. Even though Stefan and Samael were now on the same boat, things for this child were still the same, and Klaus would still say the same things he used to tell his nephew.
But Klaus had to. He had to repeat these painful words, which only reminded him and Claude how little their world was. That in this world, the surface was thin as eggshells. Hence, each step should be careful and their weight calculated.
Hence, it had always been safe for Claude to stay within this cold palace where no one ever bothered to go. Claude's safe zone.