So I’ve seen it a few times, people complaining about Operetta’s accent. I actually think her accent makes complete sense.
She isn’t the Phantom of the Opera. She’s the Phantom of the Opry (which is in Nashville).
Her musical focus is not opera, it is rock and roll, whose roots are in the American south.
Her style is rockabilly, with the victory rolls, her high waisted pencil skit (fashion pack) the dominance of red and black in her wardrobe and saddle shoes.
Of all of the MH dolls I think her look is one of the most thought out and in line with her character.