My beautiful wife found this picture and it shows something interesting that help validates that a good person who dies can hook themselves onto something or someone that is a living physical being.
Look at the picture with the circle then look on the right of his face and you will see a spirit being who is hook on this person.
I have seen this few times on people who are walking by me on the street.
What can happen is the living physical being can take on some of the personality of the spirit being. Most likely the being who is attached to you is someone you know like a love one or family member.
To remove this spirit is easy and effortlessly by going to a shaman. Going to a main stream religious leader about this issue will be hard to resolve because they will be blind to seeing the spirit entity that is attached .