Considering this hasnt been touched after this for two years, hopefully the manga crew was like, "No, you've had enough" and cut off the novel writer.
Can't stand writers/mangakas who can't just end shit and have to draw shit out (which then OF COURSE is a gimmick to enable them after that arc to be like "Oh hey that thing we did/mentioned/alluded to in this unecessary "last arc?" We're gunna make ANOTHER arc about that now" rinse repeat).
I get its implied about her and the sea king/queen/whatever, as well as the sky king/queen/whatever was chown cut off in one chapter, but it just feels like that's what's going on here.