It looks fucking dumb, but I think it's her current fixation and she keeps wearing her hair that way in streams and stuff. I've noticed she does that a lot with hairstyles or particular clothing items. Once she's in to a "look" she wears the shit out of it, over and over again.
This hairstyle looks particularly dumb though, because the pig tails should be higher and the hangy bits look ridiculous. But my guess is Eugenia cannot lift her arms long enough to do the style correctly, and wearing high pony tails of any kind would fuck up the extensions she DEFINITELY DOES NOT HAVE, YOU GUISE.