Kukkii-san
The cosplayer was concerned about the color looking as natural as possible, somewhere between blonde, brown, and red; I picked a rare shade of reddish blonde (not quite as coppery as the Link wig in my gallery) and dyed the roots a darker, ashier color.
With part of the hair being pulled back into a loose ponytail, this style is meant to be worn with Hermione's yule ball gown. However, the cosplayer can always remove the hairtie and restyle the wig at will - thanks to the thickness of the wig and the large skin top.
1 mid-length wig (15 - red-gold medium blonde); wig dye (brown/grey mix)