Demon (tag) is a Tag in Divinity: Original Sin 2 that allows the player to have certain dialogue with NPCs and certain options during Quests. Please see below for a list.
This is a tag, but most of the time you use it, it ends up in either running away in fear, or fighting them.
This isn't a tag, it's a talent.
There's also the ice king tag that lets you give any NPC a frozen yogurt for +5 attitude!
Everything I could have ever wanted to know is right here on this page. The secrets of the universe are mine to peruse!
Fake trolling tag delete this page
This is the most helpful page I have ever seen.