She came one day. Out of nowhere, she came striding out of the woods with an injured Mark Reynolds in tow. But let's back up. How did he get there, and who is she.
Mark was walking through the forest, looking for a backpack of supplies that was left by a man on the 11th pilgrimage. He was alone and only armed with a sonic gun. He was in a hurry to get back to Terra Nova in time for dinner at the Shannon's house with Maddy. There was a rustling behind him that caused him to turn on his heel. A Slasher bolted out of the brush and shot it's heavily barbed tail at his head. Being the well trained soldier that he was, he dodged it and fired his weapon. Smiling triumphantly, he turned his back on the stunned slasher, forgetting that they travel in groups. This one happened to be with its mate, who was waiting in the bushes right next to him. She sprung on him in a flash. The world spun away from him as he felt his life drain from him. The Slasher's talons pierced his armor and its weight cracked his ribs and snapped his left leg. The last thing he remembered was hoping Maddy would not be allowed to see his body, because this was going to get ugly.
The more interesting part happened after his eyes closed. She came running after her pets, hoping she could share some of their food, but saw that it was a soldier. She whistled to stop her beasts and ran to his side. Something in this young man's face made her want to save him. She fixed him as well as she could, using her combat medic background to save his life. She reset his leg and ribs and sewed the gashes in his chest. Once he was stable, she lifted the man with help from the dinosaur and brought him to her 'home'. It was a cave, cold and dark, but a home for now. He did not wake for three days, in that time she came and went, collecting food and running her tests on plants and animals alike.
He woke up on the fourth day at daybreak. His combat training told him to fight this wild looking woman who held him down, but one look in her eyes told him her intentions were good. He froze when he felt the pain in his chest. She frowned when he hissed out a breath and lifted his shirt to see if her stitches had shifted. He gaped at her, not understanding her intentions.
"You are hurt. Let me help" she said in sharp English. He nodded after assessing her. She was slender, but muscled. She had heavy dark hair that framed her angular face. Her skin was a sickening shade of white, but she moved slowly and surely, like she knew what she was doing. Her eyes were unreadable as she scanned his chest, her face taking on a very mask-like form. His head was held still by some kind of mechanism that he assumed stopped him from seeing his injuries. He'd seen Dr. Shannon and Lieutenant Washington do the same thing hundreds of times on his friends who had ugly wounds. He did not want to see what had happened to him. He knew it was from a slasher, and knew it would be ugly, but seeing as he survived the initial attack, he would probably survive. She washed his gash with clean cool water that stung and killed anything that was living in the cut. She was using disinfectant on his chest, he soon realized. That was a trick he'd only seen once.
Wash had told him to lie still. They were out on patrol and had gotten ambushed by Sixers. He had a cut on his arm, not life threatening, but still a good thing to keep under control before it got infected. Wash knew that disinfectant was not a preferable sterilizer, but it worked. When mixed with cold water it was almost painless when applied.
But how did this girl know the trick. He had decided that she was younger than him, maybe Maddy's age. Maddy, the reason he allowed a stranger to dress his wounds.