Meanings of alien emissary in English

The Marshal had expressly invited the alien emissary for this occasion.

Standing before the alien emissary, humanity was, for the first time, at a loss of words.

For the first time, the alien emissary did not wait for a question, but proceeded to speak on its own.

They were politely, respectfully observing the alien emissary, but too cautious to engage with it and speed up the process of understanding its message.

Alien emissaries, and powers beyond our comprehension like the Sleeper in the Pyramid-