Tyriok Gadsworth

is an apprentice cartographer, whom Vox Machina met in. As an NPC, he is played by Matthew Mercer.

Encounters with Vox Machina
Tyriok first met Vox Machina in Vasselheim, where they stopped in a tavern to ask for directions on their way to the Fire Ashari. He advised them to stay on the road for safety, and also requested that they take note of any landmarks or other information he could use for his maps.

Trivia

 * Tyriok is the third character featured in Critical Role missing a hand, preceded by Anna Ripley and Cerkonos, and followed by Shale.  (Victor is missing his fingers on his right hand, but he still has the actual hand.)