        This scene involves Don Giovanni who hides his identity and enteres Donna Annas room for an amorous adventure and leaves Leporello, his nervous sidekick, outside pacing back and forth.  We hear short statements from Don Giovanni and Donna Anna with brief nervous statements from Leporello.  Don Giovanni refuses to identify himself to Donna Anna who eventually leaves when the Commandant enters to defend her.  Don Giovanni kills the Commandant who will appear as a ghost later in the opera.   Leporello is the comic character while Don Giovanni is the arrogant character.  Listen to how they are characterized by the music.