Five years later, now that I've fully fleshed out SCP-135's exact origins…
SCP-135 feels what I noted in my original comment, but, additionally, is upset because she can't hear her father/"father" anymore, since the containment site isn't on the mountain. Don't get me wrong — she's fully locked-in and couldn't reply — but it's the difference between hearing a kind voice sometimes and not.
She's a wish-child, granted by one of the old gods of the hills to an otherwise infertile woman, but when she asked for "life, in the form of a child", he thought she meant "Life"-with-a-capital-L, and a mountain's idea of what it means to "survive adversity" is… not the same as a human's, to say the least. It turns out that the abstract concept of Life can't completely "fit" into a human body, but since the other parts of the wish prevent her from turning into, say, an SCP-427-style flesh beast, SCP-135 is instead conceptually leaky. All the excess "aliveness" violently crams itself into any other living cell it encounters, for lack of anywhere else to go, and in the process breaks everything holding that cell back from making more cells for it to be in.