天蒼のスピカ

Masterpiece, best quality ,one girl, long wavy blue hair tied with galaxy-like ribbons and dark flowers, silver eyes, pale skin, wearing a dark navy dress with glowing star patterns and an open back, black choker, sitting gracefully in profile, holding a luminous eight-pointed star in both hands, side view, looking at the star, background is a circular celestial chart with constellations and cosmic dust