Just a couple of feet in, Yuki uncovers a rather large Krevbornski shepherd dog, stiff as a corpse. As soon as it is uncovered, it revives and start to frantically dig down.
About five feet down, the dog uncovers a redheaded woman, very pale as if she hadn't been in the sunlight for years. She resembles the description you have received of Nadja Ovlova a lot, although if that were she and she were still alive, she would be obviously too young - this girl doesn't seem to be any older than Tanya.
The redhead looks very scared and frightened, her clothing reduced to worm-ridden rags and her skin covered in very old, black-crusted blood. As soon as she revives, fresh blood gushes once again from her wounds at a worrying pace. She is obviously in too much pain to even move herself and will perish soon if nothing is done to help her.