I was very confused reading the whole thing. It's not really clear what SCP-XXXX actually is, at least to me. For example, you have all these things attached to SCP-XXXX, but it's never told explicitly what the skip actually is. I'm guessing that -C was the original SCP? I think that the absence of what exactly SCP-XXXX-B confuses things even more. All the expunged data just makes things feel incredibly vague to me. I understand that you want us to feel sad for -A and Dr. Forrest but there's a disconnect on why I should feel bad because I don't know what -B is, what it entails, and how changed -A is because of it. All I know is she's childlike, which again doesn't make sense considering that all of humanity's emotions being forced into her. Even with memory loss, I don't think she would be child-like. Maybe crazy? I'm not sure.
I also really don't understand why -A was chosen to be a D-Class. You state how shocking it is that she is one, but what set of circumstances let this happen? It seems like it just happened just because.
Also one of your footnotes is kind of screwy. It looks like "23" when it's actually a "2" next to a "3". Maybe you should just combine those to make a single footnote.
I wish you luck!