ultra-detailed illustration, halloween, 2girls, duo, a girl wears jiangshi costume - wide sleeved chinese clothes, qingdai guanmao with an ofuda talisman. another girl wears cute devil costume - small horns, frilled gothic short dress with small bat-like wings, and argyle patterned tights. happy mood, smile, open mouth, looking at viewer, symmetrical composition, sharp outlines, intricate details, dreamy purple tone, watercolor-like uneven brushworks, dark background, retro manga style