YURIKUMAA! Both cosplays are self-made by the cosplayers.
Lulu: https://www.facebook.com/pages/Luminescence-Cosplay/
GInko: https://www.facebook.com/JatekCosplay
Photographer on the first one: https://www.facebook.com/KifiaCosplay
Photographer on the other two: https://www.facebook.com/NiewPhotography