Petrov

 was a half-elf and one of the people kidnapped by Yeenoghu-worshipping gnolls near Alfield; the Mighty Nein found him in the Rill's Mouth Mines. As an NPC, Petrov is played by Matthew Mercer.

Appearance
Petrov was a half-elven man in his older years. His features were a little sharper, a little more elven than half-elven, but not fully. His hair was dark brown/black to gray, and salt-and-pepper on the sides. Due to the gnoll attack, he was disheveled and had a large gash across his midsection that might have been infected.

Background
Petrov said he was planning on passing through Alfield on his way to sell armor-wares in Zadash when he was kidnapped just outside of town.

The Mighty Nein found Petrov in a locked room in the Rill's Mouth Mines and rescued him.

Trivia
Coincidentally, in Explorer's Guide to Wildemount there is a character named Petrov associated with mines: Petrov Sauer, a mining baron in Druvenlode and father to Yrrosa's starosta, Zulla Sauer.