Divine: Soothe move

Soothe: If you talk to someone for a few seconds in a quiet voice, you can calm them down, blocking any panic, anger, or other negative emotions. This works even if the thing that freaked them out is still present, as long as your voice can be heard.

Does it work even on other hunters or only on NPCs?

Yes, hunters are definitely included in "people."

Except, maybe, some Monstrous, Summoned or Divine hunters, depending on their exact origins.