Use case: identity-preserve. Edit ONLY this exact revised Surly portrait's EXPRESSION to the faint COLD SMILE described in the prologue.
Mouth remains closed, one corner rises just a little, lids narrow slightly. Controlled confidence without warmth or glamour.
Preserve identical close-cropped mousy fair hair, ordinary thin features, brown eyes, blue skin, head shape and angle, position, neck, salt-stained grey robe, shoulders, lighting, palette, pixel-art surface, canvas and crop. Do not restore the earlier fuller hair, cosmetics, adornments or a glamorous smile. No turning or face reshaping.
One transparent5:6 bust,160x192 logical readability; only brows/eyelids/mouth may change. No text, background, frames, swatches, hands, glow or extra faces.