I agree Jonas.
However, I don’t believe that all people project a different persona that is not consistent with their true personality. I know many people who “authentically” project their true personality as their persona, so the personailty and the persona are both the same to the people they engage with.
Then there is the other end of the spectrum where people are so self conscious they go to great lengths to project the type of persona “they think” others like, no matter how far from their true personality or reality this perception may actually be.
I think that if you spend enough time with anyone you will see their “true” personailty no matter how elaborate they have constructed their persona or the lengths they go in order to protect it and project it.