Leia appears in a dress-like formal coat, which wraps around her beautifully and falls in shimmering white folds to the floor. Her hair's in an extremely complicated braid, piled high on her head and secured by golden hairsticks with little gemstone flame charms, golden meshwork and filigree flames decorating the braids themselves.
She's carrying herself more regally than Dalia's ever seen - and she must be wearing heels and pretty tall ones at that, going by her current height, but she glides like she's floating. Even many of the models Dalia's invited can't move that elegantly, in or out of heels.
She's one of the first to arrive, and does very well with the social mingling. She's definitely good at political mingling, though Dalia gets the sense she's occasionally restraining herself from punching someone. (She also insults a lot of people. None of them notice while she's in front of them. Most don't realize it even after she walks off, but - it's clear many of the people hovering around those Leia dislikes noticed the barbs.) She takes up an exactly politically appropriate amount of Dalia's time, given her station relative to Dalia's other guests - though she's open about her fondness and closeness.
She ducks into the coat room as they're going to the ballroom - and emerges a minute or so later sans coat, revealing a deep, ruby red blouse and black tights. The blouse hugs her body where her coat had fallen away from her in graceful waves. It's one of the ones Dalia picked out for her - a high collar with a teardrop cutout over her sternum, a darker half-cape affixed to the collar with golden chains. The fabric shimmers in the dance hall lights. It's gathered in at her waist with a braided golden chain that echoes her hairpiece, with similar gemstone flames along it. The blouse is just about long enough to be a minidress, though the slits up the side would make wearing nothing under a bit indecent (and are tied to each other by threads that look gold but are actually a very expensive sort of elastic so they stretch as she moves). The tights are thick and stretchy enough to double as exercise pants, but, well, they're certainly not hiding Leia's figure. They're decorated with golden thread, which blends into Leia's stiletto heels - which are a shiny black with gold straps winding up her calves. She's wearing matching jewelry on the same gold, black, and ruby flames theme - small earrings, a pendant that hangs into the teardrop on her blouse, bracelets that wrap around her forearm, echoing her heels, small glimpses of golden chains on her shoulders whenever her blouse shifts just so.
(The jewelry, hairpiece, and belt are new, and she's had modifications done to the blouse - altered the fit, and many of the fasteners have changed.)
And she glides up to Dalia, a smirk on her lips.