Stories are interesting.
Operas tell stories, so every opera tells a different story.
There are as many characters in an opera as necessary to tell the story. There is no fixed number.
There are a number of good websites that offer synopses of operas. A couple of these are listed below.
yes, they have operas in Italy just as they have operas in every other country. In fact you can see which operas are scheduled on the site below.
Mozart's operas marked a shift from the ornate and often serious tone of Baroque era operas, emphasizing clarity, character development, and emotional depth. While Baroque operas often focused on mythological or historical themes with a grandiose style, Mozart incorporated everyday situations and relatable characters, blending humor and drama. His operas also featured more nuanced musical expression, allowing for greater emotional range and complexity. This evolution made Mozart's works more accessible and engaging for a wider audience.
If by transition, you mean 'link' -- one can find re-iterations in Wagner's Ring operas -- each of the four -- of the entire story, told and retold in other operas, for example. This means that in order to understand the Ring stories, it may not be necessary to enjoy all four -- about 26 hours -- operas, but you may miss out if you do not attend them all.
Johann Adolf Hasse has written: 'Alcides an der Doppel-Strasse' -- subject(s): Librettos, Operas 'Egeria' -- subject(s): Librettos, Operas 'Soliman' -- subject(s): Librettos, Operas 'Arminio' -- subject(s): Librettos, Operas 'L'Ipermestra' -- subject(s): Ballets, Librettos, Operas 'Miserere, for S.S.A.A. voices and string orchestra' -- subject(s): 51st Psalm, Choruses, Sacred (Women's voices, 4 parts) with string orchestra, Psalms (Music), Vocal scores with piano 'Il Ruggiero, o vero, L'eroica gratitudine' -- subject(s): Librettos, Operas 'Alessandro nell'Indie' -- subject(s): Librettos, Operas 'Il trionfo di Clelia' -- subject(s): Ballets, Librettos, Operas 'Demetrio' -- subject(s): Ballets, Librettos, Operas 'Viriate' -- subject(s): Librettos, Operas 'Cajus Fabritius' -- subject(s): Librettos, Operas 'Alfonso' -- subject(s): Ballets, Librettos, Operas 'Il Demetrio' -- subject(s): Librettos, Operas 'Artaxerxes' -- subject(s): Librettos, Operas 'Alcide al bivio' -- subject(s): Librettos, Operas 'Adriano in Siria' -- subject(s): Librettos, Operas 'Asteria' -- subject(s): Ballets, Librettos, Operas 'Euristeo' -- subject(s): Librettos, Operas 'Leucippus' -- subject(s): Librettos, Operas 'Artaserse' -- subject(s): Librettos, Operas 'Solimano' -- subject(s): Librettos, Operas 'Eurimedonte, e Timocleone, ovvero, I rivali delusi' -- subject(s): Librettos, Operas 'Das Olympische Spiel' -- subject(s): Librettos, Operas 'L'opera Semiramis reconnue' -- subject(s): Librettos, Operas 'Parthenope' -- subject(s): Librettos, Operas 'Alfonso' -- subject(s): Librettos, Operas 'Romolo, ed Ersilia' -- subject(s): Librettos, Operas
One of Rossini's operas is the Barber of Seville.
Operas composed by other composed are not Puccini operas.
Gaetano Latilla has written: 'Siroe' -- subject(s): Ballets, Librettos, Operas 'La pastorella al soglio' -- subject(s): Librettos, Operas 'Gl'Ingannati' -- subject(s): Librettos, Operas 'Ciana' -- subject(s): Librettos, Operas 'Il vecchio amante' -- subject(s): Librettos, Operas 'L'ambizione delusa' -- subject(s): Librettos, Operas 'Amore in Tarantola' -- subject(s): Librettos, Operas 'The favourite songs in the opera call'd Don Calascione' -- subject(s): Operas, Scores 'L'isola d'amore' -- subject(s): Librettos, Operas 'Demofoonte' -- subject(s): Librettos, Operas 'Madama Ciana' -- subject(s): Librettos, Operas
Pasquale Anfossi has written: 'L'orfanella americana' -- subject(s): Librettos, Operas 'Ezio' -- subject(s): Ballets, Librettos, Operas 'La vedova bizzarra' -- subject(s): Librettos, Operas 'Die Eifersucht auf der Probe' -- subject(s): Librettos, Operas 'Il geloso in cimento' -- subject(s): Ballets, Librettos, Operas, Scenarios 'I viaggiatori felici' -- subject(s): Librettos, Operas 'L'avaro' -- subject(s): Librettos, Operas 'Lo sposo per equivoco' -- subject(s): Librettos, Operas 'Isabella, e Rodrigo, o sia, La costanza in amore' -- subject(s): Librettos, Operas 'L'amante confuso' -- subject(s): Librettos, Operas 'L'americana in Olanda' -- subject(s): Librettos, Operas '(Negli elisi ombra onorata)' 'Antigono' -- subject(s): Ballets, Librettos, Operas, Scenarios 'Il matrimonio per inganno' -- subject(s): Librettos, Operas 'Demofoonte' -- subject(s): Ballets, Librettos, Operas 'Gengis-Kan' -- subject(s): Librettos, Operas 'L'olimpiade' -- subject(s): Ballets, Librettos, Operas, Scenarios 'Azor re di Kiginga' -- subject(s): Ballets, Librettos, Operas, Scenarios 'Le gelosie fortunate' -- subject(s): Ballets, Librettos, Operas 'Die Heyrath durch Betrug' -- subject(s): Librettos, Operas 'Die Narrheiten der Eifersucht' -- subject(s): Librettos, Operas 'La maga Circe' -- subject(s): Librettos, Operas
Both are filled with Drama. And normally people in operas sing more than they actually talk.