Which adjective does not describe a character who is stereotyped?

typical
unoriginal
oversimplified
unexpected

The answer is: unexpected.

A stereotype is a figure that is unchanging, oversimplified and commonly accepted to represent a person, thing or event.

In literature, a character that is a stereotype may be employed in order to explore its characteristics and denounce them as false or inaccurate, or, for various motivations, hold them to be accurate (usually one would find this in text of a propagandistic nature). However, the use of stereotypical characters is usually a poor choice to work on a character since the traits of a stereotype are typical, unoriginal, and oversimplified, which goes to the detriment of the author´s capacities as a writer.  

a personal narrative essay is about a personal experience, so it is usually written in the first person. to maximize its impact, the essay should: be written to have an emotional impact on the reader. include a lot of references to sensory perceptions and hope i