Note that official materials always have edges of hair out of screen, or hidden behind her if that is not an option.
It is the form Madoka takes in the final episode of the anime, after wishing to get rid of Witches entirely and unleashing the full power of her magic potential accumulated over multiple timelines to become an incredibly powerful, goddess-like being.
Affectionately nicknamed "Madokami" or "Godoka" by fans.
