When the Dragonborn reaches Karthwasten, Ainethach is seen arguing with Silver-Blood mercenaries about his mine, Sanuarach Mine. The mercenaries want him to sell it to them for helping clear Forsworn invaders from it.
The Dragonborn has the option to choose to help him keep his mine by either convincing Atar and his Silver-Blood Mercenaries to leave, or simply killing them so they are no longer an issue. It is also possible to side with Atar instead, and convince Ainethach to sell his mine. Regardless of which side is chosen, the Dragonborn will receive a leveled amount of .
Ainethach is a marriage candidate. As with all possible spouses, he makes a daily profit of 100 that does not have to be collected every day. He will hold onto the amount as it increases until it is asked for by the Dragonborn. If Voada is killed, he will send hired thugs after the Dragonborn for killing 'his dear Voada', despite being a marriage candidate.
- "I'm one of the few native sons of the Reach that owns land. It doesn't make me very popular."
- "The Forsworn think I'm working for the Nords. The Nords think I'm working for the Forsworn!"
- "They already own Markarth, and they won't stop until they've bought all of The Reach!"