Use case: identity-preserve. Edit only the EXPRESSION of this exact adolescent fiddle-carrying Bridgeburner bust to a small dry WRY HALF-SMILE.
Slightly lift one corner of the closed mouth and one eyebrow, a shrewd knowing look shared with a familiar commander. He remains about fifteen, pockmarked, wiry and weathered but young. No broad grin, exaggerated surprise or comic symbols.
Preserve exact identity, head shape/position/angle, red hair, healed skin marks, eye colour, mismatched armour, stained olive-grey uniform, straps and the same broken scorched fiddle. Preserve lighting, pixel-art rendering, palette, shoulders, canvas and crop. Only eyes, brows and mouth change; no beard, age change, new scars or costume change.
One standalone transparent5:6 bust,160x192 logical readability, no labels, frames, swatches, background, hands, extra view or glow.