u/Gnadey

Use this prompt inside Nano Banana Pro with your reference images ( I used aicreatorlabr.com )

{
  "Subject_Constraint": {
    "Directive": "Use the exact person from the reference images, maintaining 100% facial and physical likeness. Use the hairstyle, hair length, hair color, hairline, and all hair characteristics exactly as shown in the reference images without alteration.",
    "Expression": "Soft, relaxed expression with slightly parted lips, neutral eyebrows, calm eyes looking toward the smartphone screen, creating an introspective and effortless candid appearance.",
    "Outfit": "Fitted black short-sleeve crew-neck t-shirt paired with a short black ruffled skirt. Black sheer patterned tights featuring alternating vertical opaque stripes and lace-like mesh detailing extending to the feet. Natural glossy manicure with medium-length almond-shaped nails."
  },
  "Social_Media_Aesthetic": {
    "Style": "Minimalist bedroom mirror selfie with authentic lifestyle influencer aesthetic, ultra-realistic smartphone photography, clean casual social media content.",
    "Camera_Angle": "Vertical mirror selfie captured from a slightly elevated angle while seated. Smartphone held in front of the face at eye level, producing natural smartphone perspective and an intimate composition.",
    "Post_Processing": "Soft diffused indoor daylight with balanced exposure, realistic skin texture, muted neutral color grading, crisp details, subtle contrast, premium smartphone image quality, and no excessive beauty filters."
  },
  "Pose_and_Composition": {
    "Framing": "Vertical portrait orientation, framed from approximately the knees upward. One leg extends prominently toward the camera, creating strong foreground depth and perspective.",
    "Body_Language": "Seated comfortably on a bed with the back resting lightly against pillows. One knee bent toward the chest while the opposite leg extends diagonally toward the camera. One arm raised naturally holding a black smartphone for the mirror selfie, while the opposite arm rests comfortably beside the body. Relaxed shoulders and effortless posture create a candid, editorial-inspired composition.",
    "Safety_Detail": "The smartphone must be clearly visible and naturally held. Accurate anatomy, realistic foreshortening of the legs, physically correct proportions, authentic mirror perspective, and consistent lighting throughout the image."
  },
  "Environment_and_Lighting": {
    "Setting": "Minimalist modern bedroom.",
    "Lighting": "Soft natural indoor lighting evenly illuminating the subject with gentle shadows and smooth tonal transitions, creating a cozy lifestyle atmosphere.",
    "Background": "Large wall mirror reflecting the seated pose. White bedding and oversized white pillows against a plain white wall. Dark textured rug beneath the subject, uncluttered surroundings, and a clean minimalist interior emphasizing the subject."
  }
}

Use this prompt inside Nano Banana Pro with your reference images

{
  "Subject_Constraint": {
    "Directive": "Use the exact person from the reference images, maintaining 100% facial, hair color and physical likeness.",
    "Expression": "Playful and confident: looking off to the side with a pronounced kissy pout, lips pushed forward, relaxed eyes, subtle cheek tension.",
    "Outfit": "White ribbed tank top, oversized round transparent-frame eyeglasses, white-and-black mesh trucker cap with a completely blank front panel (no logo, text, branding, symbols, or graphics)."
  },
  "Social_Media_Aesthetic": {
    "Style": "Close-up smartphone selfie with influencer aesthetic, highly realistic social media portrait.",
    "Camera_Angle": "Front-facing camera held at eye level, close crop from upper chest to top of head. Subject centered while glancing sideways, creating a candid expression.",
    "Post_Processing": "Natural bright indoor lighting with soft realistic glow, realistic skin texture, subtle flash effect, high-detail eyes, no heavy filters, authentic smartphone photo quality."
  },
  "Pose_and_Composition": {
    "Framing": "Vertical portrait orientation, tightly framed from upper chest upward, face occupying most of the frame.",
    "Body_Language": "Standing close to a mirror, shoulders relaxed, head slightly turned, eyes looking sideways, lips pursed into an exaggerated pout. Reflection visible behind the subject showing the back of the cap and upper body.",
    "Safety_Detail": "Natural anatomical proportions, realistic facial structure, accurate reflections and perspective."
  },
  "Environment_and_Lighting": {
    "Setting": "Minimalist modern indoor room.",
    "Lighting": "Direct smartphone flash combined with bright clean indoor lighting, evenly illuminating the face while creating subtle highlights on the skin and glasses.",
    "Background": "Plain white walls with a white paneled door. Mirror positioned behind the subject creating a clear secondary reflection. Clean, uncluttered environment."
  }
}