A young caucasian woman in her late teens or early 20s, the first thing you notice about Jenna is her hair - it's not particularly big, or particularly long, but it is generally tousled and dyed in any number of random colors. Her eyes are blue and usually lined with dark kohl, her only makeup. Her fair skin has the barest hint of freckles, though only in summer.
Her body suggests that she keeps in shape - not overly muscled by any means, but athletic in tone. She usually dresses in the widely recognised student uniform of jeans, tees, and similar casual wear - but never skirts or dresses.
Her accent is hard to pin down, suggesting someone who's moved around a lot.