In those plofile pix, Maimi is really giving me Akimoto Sayaka vibes. Airi's outfit looks like the top half of a nice ensemble. Chisato's dress has that ugly seam, but overall she looks very good there. Maimai makes me think of bubble gum. Nakky's is the weakest link.
I think Nakky looks the best there, but that's also my personal bias.
I guess with the outfit they gave her, it's like she looks good even if she's wearing an outfit for staying at home or going out only to run errands. That's true for Airi as well. The other girls look nice but also like they're supposed to look nice and presentable in public.