Clearly not the last we'll see of Mei. Whether she'll turn into a stalker is debatable--but I kinda see it as her actually staying away, and Amane being the one who blinks first and seeks her out.
Amane thus far has been the one who uses others and then discards them and moves on without thinking about anyone's feelings but her own. So if she suddenly comes down with a bad case of budding empathy when it comes to Mei, that would be a reasonable path forward for her character, in my mind--and it would be an inversion on what we've seen with her up to that point, thus flipping the script on the current narrative beat.
Still shocking to me that Mei's chasing the memory of a ghost, but it's very, very compelling at the same time. It gives her this naivety and weird "sad innocence", so counter to Amane, that I think they actually create complements for one another, if in a potentially dangerous fashion. This flashback into Amane's past will hopefully be illuminating, though, insofar as explaining more about why she is the way she is now. I expect it will shed more light on Amane underneath the selfish veneer she wears, potentially exposing the girl who (I assume) will eventually be falling for Mei.
Thanks for the TL. Glad this one's being kept up with.