A whimsical anime-style social media avatar design depicting a vast, radiant sun dominating the celestial backdrop, with a diminutive young girl with flowing emerald tresses playfully chasing after it, her delicate form a mere speck against the sun's immense, fiery visage, highly stylized with bold outlines and vibrant colors, employing dynamic perspectives and depth of field to convey a sense of cosmic wonder and childlike pursuit, intricate celestial textures and motifs, 8k --s 400 --ar 1:1 --niji 6