Persona is very much the outward facing acts and image of a person and could be orthogonal to personality. So to parse the posters comment you need to assume that being a charitable person is more than the act of given money to people in need and can also be a personality trait (or at least constituent virtues that expressing charity indicates can be part of personality).

For instance if there was a homeless person on my street and I figured that giving them $500 would have good odds of having them OD and no longer being on my street... what looks like a charitable act very much isn't. So while it would contribute to a charitable persona it wouldn't reflect personality.