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It was a very interesting dream, although describing it is just as interesting, but I doubt I'll be able to convey my impressions.
In short, in the dream, I found myself in a dark room and realized that I wasn't alone, and not just in a figurative sense. No, it wasn't about some monsters or anything like that; it was two very cute girls, one dark-haired with a slightly upturned nose, and the other fair-haired and above average height. I don't remember how I discovered them, but we ended up with the fact that, although they were always present, they were mostly invisible, as if hiding. But, since I knew about their existence, and they somehow trusted me, I could sometimes ask them to appear if they were nearby, and they would appear. I remember using this "privilege" during some emotional turmoil, although I don't remember what those states were connected to. In the dream, I was probably like that all the time. Usually, I would say, "Is anyone here?", but it wasn't a spell or a ritual; the phrase could be anything within reason. They immediately understood that I was addressing them and wanted to see them.
There were specific "rules of the game." For example, they might not be nearby; they could be in another place at that time. Or one might be nearby, and the other not, in which case only one would appear. Sometimes they were in adjacent rooms and would appear there, so after asking them to appear, I would sometimes take a short walk around the house. They themselves didn't move from room to room in a visible state, although they could do so in my company. They also usually appeared in dark places, not in the light, including artificial light. But if I turned on the light or went into a bright room, they didn't disappear and didn't even seem to mind. Although in such cases, I always tried to turn off the light, just in case... you never know, maybe they wouldn't be comfortable.
Other people, by the way, also saw them, although, of course, they thought they were ordinary people. For example, once we were talking in the hallway, and my father came in, surprised that I had brought someone with me. He said a few words to them, and they even replied... There were traces of red wax candles on the floor, and my father decided to sweep them up, and we went into another room, and I asked my "companions" if these traces were related to them? Because I hadn't lit any candles there. They somehow avoided answering and steered the conversation to another topic. However, they had come to trust me, because the fair-haired one started saying that they existed to invisibly help people, something like that. I remember feeling touched, and I put my hands on their shoulders and praised them for being so good. It probably looked silly, but it was just a dream, so what the heck! By the way, although now the monologue was delivered by the fair-haired one, I usually communicated more with the dark-haired one, not because she was more interesting or I liked her more, but simply because the other one was more modest and quiet, and she had been mostly silent until then, hehe... But they were both good, beautiful, although the fair-haired one had more regular facial features, I would say.
That's how I described it in a rambling way. It's hard to do it any other way; I don't have the energy to write a description a la "Heroes" fan, but in fact, the dream was approximately as rambling as that, there wasn't much of a plot or anything like that, just separate moments and situations that I've put under a common denominator. Something like that.