Liam Christopher O'Brien (May 28, 1976, Weehawken, New Jersey, USA) 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") and Caleb Widogast. He has been involved in many video games, cartoons, and English-language adaptations of Japanese anime. His major anime roles include Gaara in Naruto, Vincent Law in Ergo Proxy, Captain Jushiro Ukitake in Bleach, Lloyd in Code Geass, Kenzo Tenma in Monster, Akihiko in Persona 3, and Nephrite in the Viz Media dub of Sailor Moon.
In cartoons, O'Brien has voiced characters in shows such as Star Wars Rebels, Transformers: Robots in Disguise, Avengers Assemble, Wolverine and the X-Men, and Hulk and the Agents of S.M.A.S.H.. In video games, he voiced Gollum in Middle-earth: Shadow of Mordor, Caius Ballad in Final Fantasy XIII-2, War in Darksiders, Asura in Asura's Wrath, Ieyasu Tokugawa in Sengoku Basara: Samurai Heroes, Illidan Stormrage in World of Warcraft and Heroes of the Storm, Yasuo in League of Legends, Zvatto in Lost Planet 2, Grimoire Weiss in NieR, the Warden in For Honor, and Barker in Titanfall 2.
He is an automated dialog replacement writer for anime and has provided voice direction for over 300 episodes of anime such as Naruto. He has also voice directed for video games such as The Last of Us, Evolve, Resident Evil 5, and Resident Evil 6.
O'Brien affirms that he often plays characters that are insane or evil geniuses, although he has also voiced comedic characters such as Fukuyama in Girls Bravo. He describes Cumore from Tales of Vesperia as "slightly unhinged". In Darksiders, he voices the lead character War, one of the Four Horsemen of the Apocalypse. He describes his voicing as deeper than his usual voice, and that he portrayed War as a fairly old soul who isn't surprised at the events around him. In the video game-based film Final Fantasy VII: Advent Children, he voiced Red XIII. In addition to voice acting, he has worked as a voice director and writer on various video games and anime shows. He also participates in the popular web series Critical Role, in which he and other voice actors play Dungeons & Dragons.
| Year | Image | Character | Title |
|---|---|---|---|
| 2018-Present | 
|
Gaara | Boruto: Naruto Next Generations |