How long do you think the Colonel stayed in the house afterward, convinced that if he waited long enough his friends would come back? :(
a while, i would assume. dark probably approaches him and tries to relay everything he can, telling him who he really is. the colonel, of course, doesn’t believe him at first, he doesn’t want yet to accept the fact that his friends are gone. and he probably runs everywhere around the house, calling for damien, calling for celine, but with no answer. and dark stands in the hallway, just watching him with a somber look like probably hating the fact that he has to convince the colonel of the truth, no matter how much it may hurt him.