Based on this post
Cybermats! Zepheera silently cursed, turning to run away from the rat-sized mechanical extensions of the cybermen. They were scouts for the most part, but she knew firsthand that they had a bite to them. Her stomach turned at the memory.
A glance over her shoulder revealed there were four cybermats chasing her inside the walls, and she only had one electromagnetic charge that might not even work! She’d modeled it off a similar device she’d seen the humans use to fight off cybermen, but she hadn’t had time to test it out before the whole place had been overrun by the cyber-vermin in pursuit of her, separating her from the Doctor.
She had no need to worry about him, he always managed to find a clever way to escape certain death. She could only hope some of that luck had rubbed off on her, because being four and a half inches tall chased by four foot-long bitey machines, Zepheera was beginning to question her chances.
Rounding a sharp corner, she caught sight of a power outlet a few yards ahead. There! She just needed to make it to there. She risked one more look behind and picked up speed. The cybermats were gaining a little too close for her liking. The second she ducked past the wires connected to the outlet, she activated her charge and thrust it towards them. The miniscule device magnetized itself to the wires and blasted them with its power, creating a surge that effectively knocked out all four cybermats before they could chew their way through to Zepheera.
She allowed herself a triumphant “Woohoo!” before climbing her way into the room outside.
The place was empty, had long been evacuated. It was pitch dark, the boarded-up windows allowing in no light; evidently, her charge had knocked out the room’s power as well. She made a mental note to make more of those devices as she crept carefully toward the nearest door. She needed to find—
Before she could finish her thought, she was swept up in a tangle of limbs and giant fingers. She began to struggle immediately; the place had been full of humans before the ambush, and she was most definitely not in the mood for this.
“Get your over-sized mitts off me!” she demanded as the hands cupped around her, allowing her to reach the small knife kept hidden in her boot. Not nearly large enough to do any human real damage, but it was enough to sting, and sometimes that was all a borrower needed to stay alive.
She’d only just got her hand around the handle when her captor replied: “Easy there, pipsqueak, it’s just me!”
Looking up and seeing the Doctor’s familiar silhouette filled her with equal amounts of relief and annoyance. “I thought I told you not to call me that. Or sneak up on me and grab me when I’m not looking!”
“Well sor-ry for checking to make sure my friend didn’t get nibbled by cybermats!” Despite the sarcastic tone, there was actual apology in his eyes. “I was worried.”
Zepheera sighed, unable to stay mad at him for long. He wore his hearts on his sleeves, and she never once doubted that he truly cared about her. “Yeah, well I didn’t. See? All four limbs. Fine. No nibbles off me. Get us out of here, big fella, I’ll tell you all about it!”
Thanks for the prompt @nightmares06!