The Hargreeves mansion was an old house, and like all the old houses you could sometimes hear noises, normally these noises could be explained logically as the creaking of doors and wood on the floor - but there were some noises that Five did not know how to explain.
Sometimes in the middle of the night he would wake up to the sound of something that seemed steep, but when Five got up to see which one of his siblings was steps running down the hall at 3 a.m.
Only to be faced with an empty and dark hall with no signs of any of the resident of the mansion.
Other times he heard crying-like noises - not that it was strange to hear in the mansion - after each individual training it was normal to hear the cry of one of his siblings.
What was strange in the fact was that the sound seemed to be coming from the room to the besides of Seven's, which was always locked-
And
Forever
Empty
The room belonged to his late brother Number4 who died falling from the stairs at the age of 4.
But it couldn't be coming from Four's room.
There is a logical explanation for the noises.
Five would find it some day.