[eli]

The English language lacks an appropriate word for this situation (singular personal pronoun that could apply to either gender). Many people feel using "he" to refer to both genders is sexist and will instead rephrase the sentence or use "they" as a singular (which is controversial). Using "she" is just another option. See http://en.wikipedia.org/wiki/Singular_they#Gender-neutral_la...

[piggity]

I much prefer gender neutral language to using "she" or "he".

Unless of course we are talking about a specific example like "John foolishly unscrewed the cap on his radiator while the engine was running".

In which case I would generally try and mix the gender across examples.

"Jane stabbed herself in the eye with a pencil when she was rear-ended by John on the way to the hospital"

[eli]

Those aren't pronouns. Making up fake names would get very confusing for the reader.