So I come from the future... [read: I clicked on the link for the raws, then the PR chapter for Vol. 9, also I don't know Japanese]
It looks like the horned girl from Vol. 8 cover (who I believe is one of the group of spirits out to take down Kamui) has taken her at some point, and is planning on marrying her for some reason -- can't tell if our girl is happy or not, but it ain't Kamui she's with so one mystery solved