[Asami makes her return indeed just in time for the ball, or at least a few hours into the evening, in the midst of all the mingling. She appears dressed appropriately for the occasion, courtesy of Miracle Country and although, let's be real, she's going to spend the majority of that time reuniting with Korra... Can't deny that she'll be incredibly glad to greet others that she knew from before. Especially on finding out just how long she's been gone.]
... It looks like some things still don't change. [Not even sure if that's for better or worse but... she's not too bothered to end up here again in the end.]