A striking portrait of a female demon with deep blue skin, her face adorned with elegant oni-like horns that curl gracefully atop her head. This cosmic tiefling from the Dungeons & Dragons universe captures a mysterious allure, blending the mystical with the otherworldly. Her eyes glow with an otherworldly light, reflecting her enigmatic nature. The intricate designs on her skin resemble celestial patterns, painted in a style reminiscent of Arcane. Flowing hair frames her face, cascading down like a dark waterfall. Her expression is enchanting yet inscrutable, embodying both the beauty and danger of a demon anime girl, with lush horns adding a touch of majestic grandeur.