Guz is an Orsimer found with her companion Eldinaran at their camp in Rivenspire at one of their possible locations. The Vestige can light their fire as part of the Lightbringer achievement.
Conversations[]
Upon encountering them:
Guz: "Your mother was right. You are entirely out of your element" Eldinaran: "Don't bring my mother into this. You'll break my concentration! Now what were the words? Lume ... illume ... blast, how do they go again?"
After lighting their fire:
Guz: "You have my gratitude"
Eldinaran: "Many Thanks"