User blog comment:Miskos3/Fairy Tail Episode 250: Tartaros arc: Erza vs. Minerva, Review/@comment-14410262-20150912124640/@comment-7418318-20150912125340

Because she didn't want to run around like a punk with long hair on her right and short hair on her left side.

Though in the anime the short hair on the left looks almost the same as the shorter bangs on her right...