An audience member should see the protagonist's personal growth and form a bond which helps in empathising with the character through their ups and downs.
In our opening I'd like to create this relationship between the character and viewer, as I see this as a typical 'Relationship-comedy' convention and also engaging.
The female protagonist Cher in Clueless uses narration to help an audience form an understanding. As does:
Carrie in Sex and the City