head - ROC Flash
torso, arms, hands and feet - ROC RA Scarlett
legs - 25th CP Shipwreck
backpack & crossbow - ROC camo Scarlett (painted)
sword - ROC CS SE
ponytail, scarf & "skirt" - Star Wars Comic Pack Dark Woman and A'Sharad Hett (modified)

Part of the new Ninja ROCverse.

Wynter is of Eastern European decent and a clan member of the new Arashikage, lead by Snake Eyes.

Snake Eyes wanting to rebuild his ninja clan went on a world wide mission to recruit the best of the best. Seeking out the pillars of his newly resurrected clan, He wanted individuals who would become the "pillars" and help him usher in a new era.

Enter Peta Kryenko.

Already trained by the Blind Master, Snake Eyes set up an "interview" with her. Having himself and Kamakura ambush Wynter. She overcame Kamakura and fought Snake Eyes to a still.