The synopsis identifies Il Commendatore as one of the other characters in the cast, whom Don Giovanni abuses and outrages. It does not specify Il Commendatore’s individual actions or explain whether he is the force Don Giovanni eventually cannot overcome, so no more specific role in that encounter can be established from the available plot summary.
Deszö Ernster has 1 screen credits in a career dating back to 1955. Signature works include Don Giovanni. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.