Ghostfist

Ghostfist was a dwarven monk and ally of Vox Machina before the Critical Role series began. He is played by Yuri Lowenthal.

Very little is known about this character other than that he made an appearance prior to the stream, as stated by Matthew Mercer in the Q&A after. If Yuri ever comes onto Critical Role, it is unclear whether he will resume the role of Ghostfist or play a new character.