A vivid portrait featuring a close-up of a blue-skinned demon girl with intricate, lush horns and an otherworldly, cosmic aura. Her features blend the fierce allure of a tiefling from Dungeons & Dragons with the captivating artistry reminiscent of the Arcane animation style. Her eyes glint with a fiery intensity, set against a backdrop of swirling cosmic energy. The design incorporates elements of traditional oni aesthetics, while her expression exudes a blend of mischief and mysticism. Fiery patterns reminiscent of stars flow along her skin, enhancing her ethereal presence, with delicate, glowing symbols etched around her horns. The portrayal captures the elegance and enigma of this demon anime girl, radiating a sense of rebellious strength and enigmatic beauty.