Nothing in your head is formless. Nothing in your head is without “words”. Is why in psycho-analysis they use word association, but it can be sounds or even body language. Just has to be language.
Now, I will go into the psychology of shadow people. They are often perceived as evil/malevolent, and this echoes human psychic reactions. They aren’t friendly, nor are they dangerous.
You may perceive that they don’t like you, and you would be correct. They don’t like you, but it’s more for the same reason you might not like to sit in a pen with pigs. Humanity generally stinks up any area psychically, but some will linger despite not liking humans, perhaps from morbid curiosity.
There is a clear mirror of that in the reality we know. I’m thinking perhaps our environmental mess is a mirror of our psychic mess? Oh, true. Reality is amazingly consistent across the board. You can’t have order of mind and lack order in environment.
To explain further, and this same phenomenon often puts people off the practice of magic, humanity has a lot of energy. With just a little knowledge they can focus this energy quite a bit. It can happen accidentally even when a person is afraid and trying to focus on a presence. But either way, they can enter a threshold state, put themselves between normal reality and the broader reality, and they usually bring their beliefs and fear with them. Often times as this person builds up energy, it gets attention. It is sort of like a phone ringing, and the entities have a sort of “Who is it?” response, but then you don’t know what to say and they get annoyed. Sort of like getting a telemarketer call, then they either linger and listen, or wander off.
You also get these telemarketing calls from humans a lot? Yes, and it’s like an ant trying to tell you about why you should leave sugar on the counter, or singing “No one knows what it’s like … to be a sugar ant” in the astral. Just doesn’t have a lot of meaning to the entities.
So is there anything to fear from these shades? No. Are they ghosts? Also no, but the formerly human can enter the state of being we would call “shadow person” as well as other states. Even more or less living as a meme in the collective unconscious which the Australian aborigines called the dream time, but that would be another topic all together.
Your thoughts are welcome. Be well friends.