Kaio: He will walk around the place looking for intruders, you can know he is close when you hear a laugh or a kind of bell (like a star). When he is in the hallway, wait for him to get to your door to close it. But there is a chance that Kaio will try to enter through the other door, so if you see him passing by the window, close the other door immediately.

Extra mechanic: Kaio can knock on your window just to scare you, but it can be a nuisance, as it interferes with other noises that may be happening around you. So shine your light in his face to make him go away.