person
The word 'persona' in Italian is used in almost exactly the same way as 'person' in English. It can represent any human being. For example, 'Lei è una bella persona' translates to 'She is a nice person'. Just like in English, it can be pluralized to 'persone' to mean 'people'.
My friend is a very kind person.
This sentence is used when you want to describe a person's character, in this case, the fact that your friend is kind. The word 'persona' is used here to mean 'person'.
Every person has their own way of seeing things.
In this sentence, we are using 'persona' to highlight that every individual or 'person' has a unique point of view or perspective.
I can't find this person.
This phrase is used when you are having difficulty locating a specific 'person'. Again, 'persona' is used here to refer to an individual.