Nyx Cyberheart is a petite and striking figure, embodying a unique blend of heroism and a hint of gothic rebellion. Her long, layered black hair cascades down her back, framing a face sprinkled with freckles that add a youthful charm. Nyx's intense, expressive eyes shine with determination, reflecting her inner strength. Her outfit consists of a snug black tank top paired with a stylish miniskirt, both adorned with intricate silver patterns that hint at her cyberpunk aesthetic. She completes her look with knee-high black boots, emphasizing her edgy style. Notably, her left arm and leg are advanced prosthetics, intricately designed with glowing circuits and metallic accents, showcasing her resilience and adaptability. The overall color scheme of her outfit leans towards darker tones, embodying her mysterious and bold personality, yet her friendly demeanor shines through, making her a captivating character in the world of heroes and villains.