Who are the four main characters in marriage of figaro?

1. Figaro - The barber of Seville, and a valet in the household of Count Almaviva.

2. Susanna - Figaro's fiancée and a maid in the household of Countess Rosina.

3. Count Almaviva - The master of the house and the husband of Countess Rosina.

4. Countess Rosina - The wife of Count Almaviva and the mistress of the house.