While Kennet might have skipped the question with most of the other employees, he did not feel the need to lead Rose in a pursuit of knowledge and lies that formed a more human image than what Kennet actually had. "I do not eat regularly." When or if he did it was only for show. His flame everlasting and unfaltering the only time he needed to renew his energies he took the magic from others.
Her thoughts touched the truth of it all but did not pass into the depth of the whys. Kennet had instructions to keep his distance. Every interaction he had with the employees became thought out and formed before they even stepped foot in his presence. For the betterment of the employees and to keep them from asking too many questions about management, it was better to have their focuses be on the stoic and strict Ringmaster.
The Djinn had his orders that needed to be followed. His separation from everyone a little more extreme than the orders that came to him, but then, the collected supernaturals had freedom to go out as they pleased. If anyone bothered to pay attention they would see that Kennet never left the fairgrounds. The employees were essentially free and unnoticing of the Djinn's magical bindings.