When a person is paranoid, they have the mentality that someone, something, or everyone is trying to hurt, trick, or take advantage of them. It might be the sensation of being observed, heard, followed, or watched over by someone. On occasion, it can be some sort of plot against them or their loved ones. Thoughts of paranoia can develop into delusions, which happen when irrational beliefs and thoughts become so ingrained in a person that nothing can persuade them that what they feel or believe is false. People who are paranoid become concentrated on their
beliefs and attempt to convince others that they are true.

https://healthwatchline.com/2023/05/26/eight-warning-signs-that-you-may-be-suffering-paranoia/