Aurora Sinister, a villain who can manipulate the Northern Lights. This portrait-oriented full-body image should depict her as a mystical and powerful figure. Her costume is inspired by the colors of the aurora borealis, with shimmering greens, purples, and blues, creating an ethereal and otherworldly look. Her hair seems to flow like the Northern Lights themselves, long and wavy with luminescent streaks. Aurora Sinister's pose is elegant yet imposing, suggesting her control over the natural phenomenon. Her expression is enigmatic, reflecting both beauty and danger. The background should hint at a nighttime Arctic landscape, under the glow of the aurora borealis.