Use when dialogue or close interior narration sounds like the author, a therapist, HR, a critic, or a generic model instead of the actual speaker; use when age, profession, knowledge, local motive, or social register should constrain wording; use when a character's voice should be modeled as a cross-layer profile — preferred names, address terms, hedges, particles, sentence endings, relation markers, habitual metaphors, verb commitment, ellipsis, repair patterns.
