looks like kogasa does go to the right person, Hijiri is impressed by the youkai-human interaction and Mystia and Cirno is also drawn into the cosplayfest
More like "options", really. Everyone else is pretty much already taken, after all.
Unless they have the option to pick someone else there. Which raises the question: If they do pick someone else, is it that person they dress up as, or the one who has to forfeit their clothing?