Original OP here but name changed!
I am so glad I started this this thread as it has comforted me and intrigued me.
I am very sad and sorry for all those people on this thread who have experienced fear, cruelty and abuse - how dreadful that you had to endure such horror.
As an addition to my original post, I have felt evil from several individuals I have had the misfortune to encounter -
A teacher at my high school who delighted in verbally abusing her pupils and who was very ready with The Belt (legal at my school until the 1990s).
A family friend who, in her 80s, had a stroke and came to live with us. I was ten years old and was living, with my own family and my grandmother, in the enormous house that was the "family pile".
The friend turned into an evil person after her stroke.
She tried to burn the house down, shat in our beds, sexually abused the family dogs, hid my teddy and made me kiss her on the lips when she "found" him.
She hit me and my siblings with her walking stick and left us with bruises. I and my siblings hated her and believed her to be evil.
She told anyone who would listen that I (aged ten) was a witch and I was a frightful child.
The woman was mentally ill but she was evil. Her favourite trick was to groan and gasp in her armchair as though she was dying.
I would walk up to her, as she sat with her mouth open and, apparently, not breathing. She would then jump up at me, screaming and cackling, and scare the shit out of me.