When I was younger, around 5 or 6, I would always see this strange teenage male sitting in the dining room of our house. I never knew who he was, and when I tried asking my parents about it, they never knew who I was talking about.
The teenager was very tall with red hair, glasses, and blue eyes. He looked very similar to me, but I knew we weren't related in any way. He would always glare at me when I ran by. I don't remember everything about him, but I do know that I would walk up to him sometimes and ask him questions regarding his identity. He never gave a straight answer. As time passed on, and I got more used to seeing him, I started calling him "big brother". I remember that he didn't like being addressed with that title. I tried playing with him a lot, but when my family walked by, they looked at me like I was crazy. "Who are you playing with? I don't see anyone," my real brothers would always say. When I told them that I was playing with the boy who always sits at in front of the china cabinet, they, too, had no clue who I was talking about. The thought occurred to me that I was the only one able to see this strange male. Of course, I didn't have a problem with this because that meant I'd have my playmate all to myself.
One day, my whole view of him changed. The teenage male was extremely irritable, and I had just bounced up to him happily, wanting to play. I don't remember what happened for the most part. The only thing I can remember is that he had begun chasing me throughout the house. The reason I knew he wasn't playing a game with me is that he was holding a small knife the whole time. The last thing I can remember from that event is a similar looking male that was slightly taller than the one chasing me had crawled out from under our table and grabbed him. He had saved me from the shorter male's wrath. I found out from the shorter male a few days earlier that he had a twin, and I realized that the taller teenage male was his twin. That was actually the last time I saw those two.
Recently, I've started seeing human-like shadows walking around the kitchen. One of them always stares at me from the nearest corner of the kitchen when I get on the public computer. The other shadow stomps around the kitchen angrily when I'm either in my room or in the living room. Could these shadows be the twin entities from my childhood? Even so, what are they?