Otherworldly: The Only Ordinary Character

If she's the only person in the book who doesn't belong in a town full of supernatural creatures, does that make her otherworldly? I'm going with yes.

• English lit teacher
• Lives an hour away so she's not seeing most of the weirdness without specific circumstances
• She's new at the school and it should take a while to realize she's the only one who doesn't live in the town
• Has had previous teaching jobs but they haven't gone well, due to circumstances out of her control (used as a scapegoat for a scandal, given the worst class, admin sucks, etc)
• Which makes her absolutely determined to make this job succeed and not go away even though pretty much everyone will be trying to chase her off initially
• She's desperate, not necessarily for money but to prove that she can actually do this job that she wanted to do so badly
• So she's a little self-focused at the moment, which means she's willing to ignore and miss some red flags about the situation (or if not red, supernatural flags)
• No "oh, I'm so plain, nobody likes me" stuff; she's pretty, she knows it, she's not a supermodel, she's comfortable with herself; the target for this book is adults and she is an adult with a reasonable self-image
• She's good with younger kids, but teenagers are a rather different and diverse bunch when it comes to personalities

This class is a remedial class, ostensibly for the kids who failed but actually everyone except her knows that they're perfectly smart they're just a) visiting from another culture, or b) they missed a ton of classes so they could save the world.
Her challenges need to be perfectly difficult for her to deal with, and have some real big consequences for her and possibly for the school (and maybe even include the end-of-the-world stuff without her knowing). The trick is that everyone else's stakes are just ridiculously high, so figuring out how to balance hers so they still feel serious from her POV and possibly even from theirs, but not going too far.