I always thought Kuu to be very Gyaru and popular with Gyaru, too. Especially since her secret times. Even Ayu is very Gyaru at some points. Kuu does all the Gyaru stuff, from the fake tan to the high fashion.

Ayu tends to do more Gyaru make-up though, with the large eyes and fish lips.
I think some people get confused, and think Gyaru is more this type of fashion:
http://thefashioncafe.blogspot.com/2...ow-us-how.html
When normal Gyaru isn't actually that extreme, it focus's more on high fashion. The fashion as displayed in that blog is called 'Yamaba' Gyaru, the most extreme fashion of Gyaru. Sifow used to be a more extreme type of Gyaru, and then she toned it down a bit to like how Kuu wears.
I really like Gyaru fashion, hahaha.

Tsubasa Masuwaka is a famous Gyaru icon, too.