Can you cut this hair to make the style shorter? If you do, will the ends unravel?

I'd give that a solid maybe. I haven't tried it, but you would definitely want to razor taper, then backcomb the ends together slightly and use a bit of heat to shape them. Otherwise, they would likely unravel pretty quickly. When left at their current length, I've had a few of them unravel over the course of several weeks.