I know I already posted a reference sheet for James, so it was only fair to post one of Jessica as well. Yes, my online name comes from her, although we are very, very separate people.
Jessica is the Witch of New York- the liason between the daily mundane and the supernatural elements of the city. City Witches develop as a sort of peace keeping organic element, tied to the city that they are chosen to represent.
While this makes her a powerful figure within New York, it means that she cannot leave the city for longer than about a week, and that she must spend much of her time dealing with both politics and arcane hierarchy.
Jessica also has to deal with the fact that major magic has a tendency to affect old injuries along her back and spine, leaving her paralyzed for hours or days.