Personally, I am hoping that Cass is bi, for my own selfish reasons and also because I'd like everyone to be happy in at least this one aspect. ^^
By the way, I know the whole Orlesian ballgown thing ran its course on the last page, but if I may submit a little something that came to mind:
F!Quizzy: Dear, sweet Maker! I can't move, I can't breathe... do they use these gowns as torture devices in Orlais, Vivienne? They should, they'd get everything out of their prisoners in mere seconds!
Viv: *lips twitch in amusement* Hardly, my darling Inquisitor; we have the spring fashions for that. Now stay still, I haven't finished. *pulls laces taught*
F!Quizzy: *mutters* Tight-laced corsets and bodices that induce heaving bosoms? I thought these kinds of dresses only existed in those books Cassandra pretends she doesn't read and Varric pretends he doesn't write...
Cass: *enters* Did I hear my name, Inquisitor?
F!Quizzy: *jaw drops* Wha... buh... what are you wearing?
Cass: *raises eyebrow* A dress. I thought that was obvious?
F!Quizzy: With a... with a corset and everything, and you're not gasping for breath or about to keel over from walking in pinchy shoes?!
Cass: *frowns* In case you'd forgotten, Inquisitor, I was a member of the Nevarran royal family before I became a Seeker and then your human-sized battering ram. Speaking of which, doing that is starting to tax my shoulders tremendously, so if we could find some other way to infiltrate the Keep next time I would be grateful.
Viv: *purses lips* Your gown flatters your figure well, my dear Seeker, but it is so plain for an event of this magnitude. If you'd just let me do some minor alterations for ornament, some embroidery perhaps, or a gold filigree. We could even get Sister Nightingale to suggest an alternate color palette to offset...
Cass: *deadpan* If you lay one finger on this fabric, I will see to it that something horrible happens to your hat collection in the night. Get that needle away from me.
F!Quizzy: This is so unfair! Cassandra's going to be all graceful, beautiful and poised, and I'm going to look like a stuffed turkey with the feathers still attached!
Viv: *cheerfully* Nonsense, Inquisitor! You'll look like a stuffed peacock, at the very least.
F!Quizzy: .... *death glare*
Cass: I... don't believe that is very comforting, First Enchanter.