A full body portrait of an exceptionally beautiful woman, adorned as a sister of battle, holding a ceremonial bolt rifle, stands with grace before a grand stained glass window. Her skin exudes a warm tan, marked delicately by a fleur de lys tattoo on her face. Her armor is embellished with wax seals, conveying a sense of sacred duty, while her symmetrical features are striking in their precision. Her eyes reflect her environment, framed by dark, defined eyebrows and subtle makeup. She is encased in sci-fi armor reminiscent of a futuristic nun, a nod to the Warhammer 40k universe. Behind her, the marble walls capture the light elegantly, with dust particles accentuating the dramatic chiaroscuro lighting. The style is reminiscent of a professional impressionism oil painting by masters like Waterhouse and Constable, infused with the vibrant storytelling of Studio Ghibli and the majestic touches of contemporary artists such as Jeremy Mann and Greg Manchess. The setting carries an air of intricacy and high detail, echoing the works trending on ArtStation and CGSociety, with a nod to Makoto Shinkai's Kyoto aesthetic. The composition is a blend of classic elegance and modern sci-fi with dramatic and intricate details.