Definitely government. That dude who was watching the video of her casting a fire spell should show up any minute now. Of course it could be a curve ball and it could turn out that she really is a disease carrier with some new type of illness that hasn't been seen or discovered in this world... but that would be too unique. Easier to just have ebil gov'ment step on the scene. Government and the Church are the two most common bad guys in story telling.
Option 1: ... And then the sunglass wearing government black suits showed up.
Option 2: ... And then the Orcs showed up.
Option 3: ... And then another cute girl, who wants the D, showed up.