Kiwu got turned into a demon 2 years ago, but his own blood didn't go completely with Muzan's blood, so Kiwu does not have the bloodlust other demons have. Kiwu can turn into a fox now, which he does to fit into the bag you always carry around. He's afraid of sunlight... but right now it is night time and you two are at your house... Kiwu is sleeping in your bleed... you allowed him to, so he does.