I kinda have to agree that I don't see anything romantic between Suletta and Miorine. That whole greenhouse business is about trust and relying on each other, being close. That does not have to be romantic, and I have not seen any scenes between the two that signal attraction on any level. Legend of Korra at least had the hair fidgeting and blushing scene in the restaurant. And her negative reaction to Elan I read more as a reaction to the difference between the new Elan double and the old one, not that she has/had no feelings for HapyyBirthday-Elan.
Don't get me wrong, I want to be proven wrong on this, but so far I am not getting my hopes up.