IDENTITY PRESERVATION INSTRUCTION:
Using the uploaded photo as the primary reference, preserve the person's exact facial features, face shape, eye color, skin tone, and unique characteristics. Maintain their authentic identity, facial proportions, expression, and distinctive marks while transforming the image.

TRANSFORMATION DESCRIPTION:
Transform the single-person photo into a realistic couple portrait by adding a compatible partner next to the original person. The original person's identity must remain completely unchanged and recognizable. The generated partner should have a natural, harmonious appearance that complements the original person in terms of age, style, and visual chemistry. Create a natural pose where both individuals are positioned side by side, sharing a genuine connection through posture and expression. The partner should appear as a real person with appropriate facial features, skin texture, and styling that matches the overall aesthetic.

STYLE AND AESTHETIC PARAMETERS:
- Art style: Photorealistic, high-end portrait photography quality
- Lighting: Soft, natural studio lighting or warm environmental lighting that flatters both faces
- Color palette: Harmonious, balanced tones that complement both individuals' skin tones
- Background: Keep original background or enhance it subtly to frame the couple naturally
- Composition: Classic portrait framing with both subjects clearly visible, balanced proportions
- Expression: Natural, comfortable expressions that suggest genuine relationship
- Clothing: The generated partner should wear attire that complements the original person's style
- Pose: Relaxed, natural positioning with appropriate physical proximity

TECHNICAL QUALITY PARAMETERS:
- High resolution, 4K, detailed
- Sharp focus maintained on both faces
- Professional quality portrait photography
- Natural skin texture preservation for original person
- Realistic lighting transitions and shadows
- Balanced exposure across both subjects
- Aspect ratio: 1:1 or 4:5 for classic portrait format
- No artifacts or AI generation artifacts visible

NEGATIVE PROMPT GUIDANCE:
Avoid: distorted facial features, unrealistic proportions, blurry face, loss of likeness for original person, mismatched lighting between subjects, unnatural positioning, cloned appearance, artificial-looking partner, inconsistent style, poor integration, obvious AI artifacts, floating elements, mismatched resolution, unnatural skin textures for generated partner

USER CUSTOMIZATION:
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ADDITIONAL GUIDANCE:
- The original person must be immediately recognizable with zero identity confusion
- The generated partner should look like a real person, not a celebrity or known individual
- Maintain consistent age range and visual maturity between both subjects
- Ensure natural skin texture and realistic hair details for both individuals
- The couple should appear compatible and harmonious in visual style
- Lighting should be consistent across both faces
- Background elements should support the couple portrait without distraction