A majestic oil painting depicting a devout sister of battle in an action scene. The beautiful warrior woman stands confidently in front of a stained glass window, her symmetrical face reflecting determination. Her eyes are reflective, with dark eyebrows and subtle makeup, complementing her sci-fi nun armor inspired by the Warhammer 40k style. She is surrounded by marble walls with dust particles shimmering in the detailed, dramatic lighting. The scene captures chiaroscuro effects and rim lighting from above, reminiscent of the works of Waterhouse, John Constable, and inspired by Studio Ghibli. The painting features intricate details and high craftsmanship, making it appear as though it's trending on platforms like ArtStation and CGSociety. Majestic and impressionistic, the artwork combines elements from artists like Jeremy Mann, Greg Manchess, and Antonio Moro, with a touch of Makoto Shinkai's Kyoto influence. The atmospheric depth is emphasized through warm and harmonious colors, avoiding any unnecessary distortions or exaggerations, ensuring balance and elegance throughout the piece.