A person who acts on behalf of another, especially in formal or legal contexts. Often used in business, law, or official settings.
He attended the meeting as the president's proxy.
弁護士が裁判で被告の代理者を務めた。
The lawyer acted as the defendant's representative in court.
Compound of 代理 (dairi, 'proxy, representation') + 者 (sha, 'person'). The reading is on'yomi.