An ancient Celtic forest queen with waist-length flowing silver hair and glowing emerald eyes, emerging from a misty primordial oak forest at twilight, wearing flowing moss green robes adorned with glowing fireflies, cel-shaded with bold black outlines, dynamic forward composition with swirling mist tendrils, deep forest green and soft silver moonlight palette with ethereal firefly glow, melancholic mystical mood, scattered floating firefly particles and ancient stone circle silhouettes, Celtic mythology forest spirit concept art with soft bokeh of distant misty ancient trees