Allie's Characters Korra went with Asami and wore this dress. She also would have bent the mithril that she got back in Middle Earth to make pretty matching necklaces for her and Asami.
Rachel Elizabeth Dare went by herself, as most of her friends had dates, and she didn't want to be an awkward third wheel. She wore this dress.
Edward Elric went with Winry, and pulled uncomfortably at his tie a good portion of the time. Still, he looked pretty damn good. He just hates dressing up. Winry probably picked out his clothes.
Mia Dearden would have tagged along with Cassie or one of her other solo friends. She wore this.
Hunk helped with the set-up so he wasn't walking in awkwardly alone. He probably let Allura dress him up, so he looked handsome.