"Is this thing a projection or something? Well, I can hold it off, Tiger, not so much...." Light said thinking to herself as her light plan didn't work at all. Getting the creatures attention, Light yelled at tiger. "Hey, look around for something projecting this thing then or something. Could just be a person behind a curtain for all we know." as she dodged the creatures retaliatory strike, only getting a large gash on her dress bottom. 

She backed the creature away from Tiger and the officers, throwing rocks at it to get its attention whenever it turned its gaze somewhere else, and occasionally getting hit by glancing blows, the creature keeping its distance from her and unable to land a clean hit, apparently remembering what had happened when Light had gotten her arm stuck in it for a moment. 

And if her projection plan didn't work, Light would have to bite the bullet and probably just hope that she could knock it out with her atrophy ability, but that would take a lot of time.