Here are all the useful NPCs of the game. They have a very distinct use in the game and are often considered as very important. You must talk to them at least once.

Candor	Tulimshar	Hurnscald	Nivalis	Others
Soul Menhir Candor	Soul Menhir Tulimshar	Soul Menhir Hurnscald	Soul Menhir Nivalis	Soul Menhir Asphodel Moor