Responses
He just finds it interesting. Think if u see a 8 year old child acting like a adult trying to outsmart a 18 year old isn't it funny and interesting personally I would find it. And the emperor is nowhere near being father like and See's his children as heirs only. He isn't particularly expecting anything from her that y he isn't making any effort to introduce her or take decision in order to increase her influence because for him she is basically a child acting like an adult but doesn't know that she is an adult from inside.
Where did the physician pop out from? She literally came outta nowhere!