I'm not convinced she's menhera, but she counts as a shiro gyaru. I guess more people need to know there are various gyaru types, seems a lot of people think the only gyarus are those from the kuro gyaru subtype (tan skin, dyed blonde hair).
The shiro gyaru subtype does not always dye their hair blonde, if any coloring is to be had, it could also be color highlights instead. All shiro gyaru keep their skin as light as possible and focus on being flashy through accessories, nails, makeup and clothing.
EDIT: There's a prequel to this, and it's all about her development into the titular Menhera Gyaru