Liam Christopher O'Brien is an American voice actor, writer, and director. He is a regular cast member of the Dungeons & Dragons actual play series Critical Role, playing Vax'ildan ("Vax"), Caleb Widogast, and Orym. He has been involved in many video games, cartoons, and English-language adaptations of Japanese anime. His major anime roles include Gaara in Naruto, Naruto Shippuden, and Boruto, Vincent Law in Ergo Proxy, Captain Jushiro Ukitake in Bleach, Lloyd in Code Geass, Kenzo Tenma in Monster, Akihiko Sanada in Persona 3, and Nephrite in the Viz Media dub of Sailor Moon.
O'Brien at WonderCon in 2017
Critical Role is an American web series in which a group of professional voice actors plays Dungeons & Dragons. The show started streaming partway through the cast's first campaign in March 2015. Campaign one ended in October 2017 after 115 episodes, and campaign two started in January 2018 and ended in June 2021 after 141 episodes. A number of one-shots were aired in the hiatus between the two campaigns. After campaign two was completed, the spin-off limited series Exandria Unlimited aired from June 2021 to August 2021. The third campaign premiered on October 21, 2021.
Critical Role
Mercer at the 2023 Critical Role live show in Wembley Arena.
The main cast of Critical Role at WonderCon in 2017.