Place this character in a situation in which he or she plays a public role (the public persona shown to others).As literary enthusiasts and...

I do not think you are going to get a 5 paragraph example
of the above assignment, but I'd like to encourage you to work through this exercise
yourself.  Based on the fact that it is for the "Literary Club," I think the point of
the assignment is to get you to explore your own creative side and to "think outside the
box."

That said, let me help you think of some places to
start.  Because you are to come up with a character who does not already exist in
literature, movies, or television, why not base your character on yourself
or someone you know.  In fact, if I was the one doing
this assignment, I'd have the easiest time writing about a character who
highly resembled someone in real life who annoys me.  I personally
have an easier time writing creatively when it is backed by a strong emotion such as
annoyance or even anger.  Then, you can even exaggerate the little things that bother
you to create in your character an even bigger
personality.

Perhaps think of a scenario when you felt
particularly annoyed, and embellish the details to lengthen your story into 5
paragraphs.  THen, when it comes to the "public vs. private" personas, you have the
opportunity to show the inner monologue of his or her brain while making your life
miserable.  I think if you make it partially personal and partially an exaggeration (and
perhaps humorous), you'll find the assignment nearly writes itself.  Just keep in mind
that you are not slandering nor disrespecting anyone in the class or school.  My thought
is to think of a generic person (like bad drivers or people who talk through movies) and
make him or her complex and real.

Have fun with this.  What
a great exercise.