Extremely big brained, just like he has contempt for Daki, Muzan dislikes Kaigaku but he would make good use of kai's desperate need for acknowledgement. I want Muzan to praise and encourage him while thinking 'Ugh Kokushibou why did you bring this guy in, so useless' 😂 making kai believes he has Potential when really he hates his guts... kaigaku feeling so proud of himself, under the illusion that he is Content and he found where he belongs at last, but really he's worthless in muzan's eyes 😌❤️ tasty.