My cat does not have the evil cat trait he is also very stupid and looks shocked when he does occasionally hiss 
My old cat was pure evil such a character she would of course insist sitting on the laps of people who disliked or even better were scared of her and she would give them a little massage too 
I left her at the vets to have her teeth cleaned. When I picked her up the vet told me he could only treat her again if I was there they had to sedate her as she attacked him and the veterinary assistants I replied poor little princess she must have been terrified he gave me this look 