“representative”

A messenger or diplomatic agent sent to represent another's interests.

“The envoy arrived at dawn, bearing sealed letters from the chancellor.”

Best for: Works well in diplomatic, historical, or formal political writing.

A person designated to act or speak on behalf of an organization or group.

“She was the only delegate who refused to sign the resolution.”

Best for: Strong in political, corporate, or conference settings; punchy and direct.

A person sent as a representative, especially on a confidential or special mission.

“The king's emissary slipped through enemy lines under cover of darkness.”

Best for: Excellent for dramatic, espionage, or historical narratives.

A diplomat invested with full authority to act independently on behalf of a government.

“The plenipotentiary signed the treaty without waiting for instructions from home.”

Best for: Ideal for formal diplomatic or legal contexts; impressively weighty.

An official deputy or ambassador, historically one appointed by the Pope or Roman Senate.

“The papal legate rode into the city to thunderous, uneasy silence.”

Best for: Best in historical, ecclesiastical, or Roman-era writing.

A spokesperson or chairperson who speaks officially on behalf of a body or assembly.

“As prolocutor for the synod, she carried the weight of a thousand voices.”

Best for: Genuinely rare; suits ecclesiastical, academic, or archaic formal contexts.