Fran!! Eddie was in thisget-up with glasses/glitter/general style support thanks to Blue! He was very nervous at first, but stuck close to Richie and the other Losers and eventually relaxed. He kept a close eye on Will (and El if she went!), kissed Richie a lot (which smeared glitter everywhere, sorry babe), and generally had a blast.
Noctis showed up to support the kids and because he really couldn't resist seeing Ignis in his rainbow get-up. He wore all black, as per usual for him, but included a demisexual pin somewhere. He would've stuck by Gladio, Ignis, and Prompto.
Zuko was another person who accidentally found themselves at the parade 😂 He was making his last delivery for the cafe he works at, so he was literally just in an apron and work uniform. After being confused and trying to figure out what was being celebrated, he lingered for a bit and smiled to himself. Being queer was not something people were open about back home (i.e. the Fire Nation), so he'd be pleased to see the festivities. Just, uh. Antisocial too lmao.
As for my last two, Aerith went (and stuck close to Cloud and Tifa if they went too), handing out rainbow flowers to random people, while Fenris went with Dorian despite strongly disliking crowds. Support!! 💖