"The Ballroom Project" works for me as a permanent title. An old editor I know would purge "The" from every title of every short story, to the chagrin of all Perhelion Science Fiction contributors, but I'm ok with letting "the" remain.

Guenneth, now seen as dowdy and dull, still has a flame in her heart for a man beneath her station (thus, unable to marry) - so she actually likes becoming invisible. What a great opening hook!

It's not clear to me who is the bride of (a son of Orsthai's most powerful family) - but Joslien apparently was hoping to be that bride. Another great hook.
Instead of searching for scattered stories, I will wait until I can read them all in one place. This is how I operated at an online fiction workshop, years ago. A chapter a week? Uh, no. If you have the whole thing, sub the whole thing to me offlist, and I will read it all at once, not week by week. My memory and attention span just don't work well enough for serial fiction.

Keep going...! You have a great start here.