A breathtaking, full-body portrait of an extraordinarily beautiful woman embodying a sister of battle, poised with grace in front of a magnificent stained glass window. Her skin, a warm olive, is adorned with a delicate fleur de lys tattoo. Her armor is detailed with wax seals, capturing the sci-fi nun aesthetic iconic to Warhammer 40k. Her eyes are reflective and alive, framed by dramatic dark eyebrows and expertly applied makeup that highlights her detailed symmetrical face. Her eyelashes lend an additional touch of elegance. The armor glows under intricate lighting, enhanced by rim lighting and dramatic chiaroscuro effects. The scene is reminiscent of a professional oil painting inspired by masters like Waterhouse, with a modern twist from artists like Jeremy Mann and Greg Manchess. The backdrop of marble walls adds a touch of grandeur, as dust particles dance in the air, illuminated by the detailed lighting. The impression is both majestic and mystical, all while being rendered in an intricately high-detail style. This piece is a fusion of influences from Studio Ghibli, trending themes on ArtStation and CGSociety, blended with the ethereal touch of Makoto Shinkai's Kyoto-inspired landscapes.