A full body portrait of a devoted Sister of Battle in an action scene, a beautiful woman standing confidently before a majestic stained glass window. Her symmetrical face glows with reflective eyes, dark eyebrows, and subtle makeup, adorned in sci-fi nun armor inspired by the Warhammer 40K style. She stands amidst marble walls, as dust particles dance in the intricately detailed lighting. The scene is reminiscent of a professional majestic impressionist oil painting, influenced by Waterhouse, John Constable, and modern artists like Jeremy Mann and Greg Manchess, with elements of Studio Ghibli and Makoto Shinkai. The armor features elements of both steel and medieval design, creating a striking, dramatic composition that trends on art platforms like ArtStation and CGSociety. The image avoids extra limbs, mutations, or blurred details, ensuring a high-quality depiction of this powerful character in a focused, refined, and artistically rich setting.