In a dramatic scene, a devoted sister of battle stands poised, her figure framed by an intricate stained glass window. She is adorned in sci-fi nun armor that reflects the gritty essence of the Warhammer 40k universe. Her symmetrical face is enhanced by dark eyebrows and expertly applied mascara and makeup, while her eyes shine with reflective intensity. The setting features marble walls, with dust particles catching the light, creating a halo around her figure. Detailed lighting effects, including rim and dramatic chiaroscuro lighting, underscore the grandeur of the moment. The composition is a professional masterpiece, reminiscent of majestic impressionism blended with modern influences from Waterhouse, John Constable, and Studio Ghibli, among others. The atmosphere is filled with depth and intricacy, evoking the dramatic style of Jeremy Mann and Greg Manchess, and the high detail artistry of trending works on ArtStation and CGSociety. The overall impression is both compelling and dynamic, remaining faithful to the source inspiration while adding unique artistic flourishes.