Full-body portrait of Zena, a beautiful Japanese idol student with vivid orange bob hair that glows softly like candlelight, wearing her signature orange headphones decorated with tiny bat wings and glowing runes. She stands at the Halloween festival of her magic academy, dressed in a pop-cute “Nightmare” cosplay outfit that mixes magical fantasy and idol style. Her costume is a short frilled dress in black, purple, and orange, with delicate spiderweb lace, tiny pumpkin charms, and ribbon bat wings fluttering gently behind her. The shoulders of the dress have subtle slits revealing glowing skin, while her mini-skirt swirls with translucent layers that shimmer like moonlight. A small pumpkin choker glows faintly at her neck, and her eyes sparkle like starlit amber. She’s surrounded by floating magical symbols and glowing Halloween motifs—tiny ghosts, candy bats, and flickering pumpkins that orbit around her like a dream. The air glows with magical aurora colors, purple and orange light dancing across the night sky. Behind her, the magic academy courtyard transforms into a Nightmare Wonderland, filled with glowing jack-o’-lantern lanterns, ghostly ribbons of light, and enchanted candy decorations. Despite the dark theme, her expression is warm and radiant—a little mischievous, a little dreamy, full of emotion. Her orange hair sways under the soft moonlight, while the metallic parts of her costume gleam with fine, realistic detail. The atmosphere feels like a sweet dream on t