Board Thread:General Discussion/@comment-27951291-20160822104053/@comment-4010415-20160822105446

I think it just looks like her hair is in a ponytail, but really, some of her hair is on her shoulders and a little bit in front of them while the rest is behind her. There's no sign of a hair tie anywhere, in volumes 2 and 3 (except for the black-haired twintails tournament disguise).