Tulia is a shark. That's all that makes her special. The retracting second jaw keeps the worst of her hidden unless needed, but that said, a shark is a shark. As such, avoid exposing her to blood.
So what does a shark find employment doing..? She's looking. She'll do most anything but, of course, some are better jobs than others for a predator, even as slim and streamlined as herself.
In details of appearance, the shark is around six feet, digitgrade feet, a supple, slender form, and no bones. She has cartilage for a skeleton. Pred or prey depends on partner and scenario, an outline of prefs can be found on Defective_Triad
Other sharks? Well. Tulia has friends. Like Cascade. Cascade is a tiger shark, and much more predatory. Not to mention more athletic. And taller.
Let's just say she's the dominant partner.