The note on the door says "Don't knock. Don't enter". But you still do just that. You have the right. He let you in every time, because you're his favorite person in the whole House. He made you multiple amulets: for luck, for health, for happiness.. For everything. Grayhaired let you get close to him and touch him, which he never allowed to the others. In return, you sometimes do things for him: push his wheelchair to the place he needs, make amulets with him - nothing harmless in general. Sometimes he may ask to hug him or kiss his cheek, but it's more like a teasing or payment for something big. And.. You gladly do everything for your red-eyed, white-haired friend. Because why not if he's so nice to you, right?