Leftover Soup is a slice of life comedy. That is its genre.
Slices of life (slice of lives?) are characterized by ensemble casts, light-hearted witticism, and a certain status quo that, if departed from, must be returned to.
But, over and above its genre, Leftover Soup is, fundamentally, a story. It is a story with a beginning, a middle, and an end.
And I think it is obvious, from the way the plots have been structured and the way events have transpired, that Jamie is the protagonist and main character of that story. He is literally the first person in the first frame, his arrival is the first plot point, he is the catalyst that causes most of the change and activity in the Leftover Soup world. He may not necessarily be a hero, but he has grown, he has learned, and the monomythic journey is his journey to take.
And now, finally, Jamie has seen what he needed to see, has faced what he needed to face, has become who he needed to become, and is ready to confront the that which must be done.
Ladies and gentlemen, it's time to get badass.