Lyanna, The Frost Sentinel

A striking character with long white hair and vivid blue eyes sits confidently against a dark background. She is dressed in a sleek, black bodysuit with a futuristic design, accentuated by a white jacket with metallic and red accents. The character holds a long, elegant sword with a detailed hilt. Her posture is relaxed yet powerful, with one knee bent and the other leg drawn close. The monochromatic palette and meticulous details evoke a sense of mystery and strength.