This is a bit if a strange one, I have been looking for answers but keep reading about unknown or shadows of the dead.
A few years ago, while staying with my parents I was sleeping on the floor of my mom's room. We had a lot of guests over and my niece was with my mum in her bed. I woke up quite late at night and saw my mum's shadow standing at the end of her bed. I was convinced it was her. I called out to her, asked her if she's ok. My mum was answering from bed. The shadow didn't move. I thought she wanted to walk past my temporary bed to get to the toilet. In the morning when I asked her about it, she said she was in bed the whole night and when we were talking she was in bed.
I decided not to sleep on the floor and shifted to her bed with her. The next night I heard whispering from the corner closest to my mom's side of the bed. My mum heard it but thought it was my sister in the next room. It wasn't, my sister came up to sleep a little later.
This all stopped after we had prayers in the house for my wedding.
Back to today, my dad is terminally ill and has to sleep downstairs as he can't do stairs. We are doing building work to build him a shower etc in the garage so all the other rooms are full. I'm sleeping in mom's room again. This time, my mum was about to go check on dad, she was sitting in bed putting her trousers on, and she called my name. I was laying in bed still. When I answered she said she thought I was standing next to her.
Has anyone got any idea of what this is? First I saw a shadow that I thought was her, now she sees a shadow that she thought was me. It didn't vanish when we saw them, we couldn't have been asleep as we were talking to them.
Sorry, busy week at work; didn't respond to your question in a timely manner.
No, I do not think you have any cause for fear:
-- it doesn't create a negative atmosphere ('dark' could be due to limited natural light conditions)
-- it doesn't try to shock or terrorize anyone
-- it hasn't attacked any family members or guests
-- it doesn't do anything but stand nearby or walk around
My reaction is that the above points are sufficient reason to leave it alone. It seems to be curious about your family, it hasn't hurt anyone, and it doesn't mind being seen (well, within limits at any rate).
The point of concern that I have is only fear you felt at the most recent encounter (your response on 22.10.19). Did you feel oppressive dread & horror or were you simply startled & concerned? If the latter, then you've had a natural reaction to an unexpected event. If the former, then there are other issues in play that may need to be addressed.
Think carefully about your state of mind at the time before responding; please let us know how you're doing, also.