In 2 Corinthians 5:20, Paul says 'we are ___ for Christ.'

Answer: Ambassadors

We are ambassadors for Christ, as though God were making His appeal through us: 'Be reconciled to God.'

“Therefore we are ambassadors for Christ, as though God were making His appeal through us. We implore you on behalf of Christ: Be reconciled to God.”— 2 Corinthians 5:20 (BSB)