It seems like he could just be acting and speaking the part of the fool.
However, his love of dolls would be true; that's not acting.
Nevertheless, he does not make a wise appearance in public.
"I am originally a fool. I just have a thing that I love and want to do excessively."
"Then let's go back to the magic city Sharia. There Zanoba, you can do what you love for the rest of your life."
"I won't go. The doll only moves after it is handled."
"Wh... what.. ?