I would say that the opera component for a solo performance is called ARIA.
This is an elaborated song for a solo voice, just one voice. It can be written for the main character focusing on his/her emotions. The term means "air" in Italian and it is connected to a melody by performed by a singer. It might be accompanied by an orchestra.
He rode a government that was under his leadership like a president but known as a dictator but he formed the party National Socialist German Worker’s.
