A young, strikingly beautiful girl with flowing burgundy hair, clad in intricate combat armor, wielding an extraordinary melee weapon with precision. Her face, elegantly detailed and hauntingly captivating, exudes a sense of lethal grace. The full-length portrait captures her in sharp focus, presented with ultra-realistic concept art techniques. This photorealistic image, rendered in stunning 8k full frame, employs the lush aesthetic of an octane render within a landscape setting, inspired by the artistic visions of Artgerm, Greg Rutkowski, and Alphonse Mucha, with a touch of ethereal mystique.