Persona
What is a Persona?
A persona, in the games terms, is a manifestion of your psyche. A sort of mask that protects you. Personas are powered by your bonds with others, social links, and the stronger your bonds the more powerful the persona.
What does this actually mean
What this actually means is that the stronger your social links the more powerful a persona will come. As in it gets a experience boost solely depedent on that social link. Now this does not mean just focus on a social link to get a powerful persona. You could do that but it takes forever and a day to find a persona of the right Arcana. Its easier just to fuse and then at the end of the game when your level 99(like a boss*wink*) re-fuse said persona that dont have all their moves which mostly be the case with starting personas.