This cube craft paper model is the Natasha, based on the anime / mange series “Saint Saiya“. The cube paper toy is designed by blackignus. The Natasha is one of Mitsumasa Kido's women and late mother of Cygnus Hyoga. After dying in a shipwreck, her remains were preserved intact by the gelid waters of the Siberian seas. She's also alternatively known, both in the manga and anime adaptation as Hyoga's Mama.
Kurumada later introduced a character of the same name in the short story arc dedicated to Hyōga in the thirteenth volume of the manga, sister to Alexer, leader of the Blue Warriors.
You can download this Saint Saiya cube papercraft from here: Saint Saiya - Natasha Cube Craft Free Paper Toy Download