A vibrant depiction of a young girl in an advanced futuristic suit reminiscent of Soviet poster style, holding a contrast of gun and roses set against the backdrop of a towering mech under bright sunny weather. The scene is rendered in anime and manga-inspired graphics, featuring deep and dark color palettes with offset printing techniques. The design is infused with intricate details and vivid realism, creating a poster that radiates happiness and energy. The image boasts 8K HD resolution in CMYK color mode, capturing natural lighting and emphasizing the blend of historical and futuristic elements, all framed in a striking 9:16 aspect ratio.