A majestic full-body portrait of a devoted Sister of Battle, captured in an action scene. A beautiful woman, she stands resolutely in front of a stunning stained glass window. Her face is finely detailed and symmetrical, framed by dark eyebrows and enhanced with mascara and makeup. Her eyes are reflective, conveying determination. Clad in sci-fi nun armor inspired by the Warhammer 40k universe, she exudes power and grace. The setting features marble walls illuminated by intricate, dramatic chiaroscuro lighting, with dust particles dancing in the air. The scene is reminiscent of a professional majestic oil painting, influenced by artists like Waterhouse, John Constable, and the style of Studio Ghibli. The artwork is trending on platforms like ArtStation and CGSociety, known for its intricate, high-detail depiction. The Sister of Battle's medieval-inspired steel armor gleams under the dramatic lighting, evoking the styles of Makoto Shinkai and Kyoto. Amidst two characters in the background, the composition is harmonious, avoiding any distortions while maintaining its epic narrative and aesthetic integrity.