Protagonists

There's a simplified schema for storytelling, in which there is a single protagonist on a mission.

And there are a lot of great stories like that.

But they don't all have to be that way. Romances, for example, whether comic or tragic, are more often of the "takes two to tango" structure. This does not prevent them from having a very strong, rather archetypal, story structure.

The hero with a thousand faces
Entangles with a heroine with superior social graces
And then it takes while
For things to reconcile.