Lot's of little pieces of info these last few chapters. I struggle with piecing little snippets together, so I'll leave that to other readers.
The thought that came up for me this chapter went along the lines of, "Is DNA testing not feasible?" We have a black wolf doctor treating the wolves in the area, why not try and see if Tsukina has any relatives in the area through DNA testing? Would it be too risky or expensive or something?
I don't know, I just think finding her black wolf heritage would be a much easier starting point.