How does each character represent the moral of the play?

Faustus represents the spirit of the Renaissance, with its rejection of the medieval, God-centered universe, and its embrace of human possibility.

Mephastophilis is a devil summoned by Faustus. His wish is to catch Faustus’s soul and carry it off to hell, although he does attempts to dissuade Faustus from making a deal with Lucifer by warning him about the horrors of hell. Mephastophilis is a tragic a figure as is Faustus. He truly regrets what the devils have lost in their eternal separation from God and he warns Faustus with repeated reflections on the pain that comes with damnation. He represents moral choices that each person has.

What other two characters are you looking for? There are quite a few.

Good Angle and evil Angle and lucifer