Liam Christopher O'Brien (born May 28, 1976) is an American voice actor, writer and voice director in the Los Angeles area. He has been involved in many English-language adaptations of Japanese anime, and is also a regular in numerous video games and cartoons. 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, and Nephrite in the Viz Media dub of Sailor Moon. In animation, he voices 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, Barker in Titanfall 2 and most recently, Infinite in Sonic Forces. He has directed for Naruto, The Last of Us, Evolve, Resident Evil 5, and Resident Evil 6. He is a regular cast member of Critical Role, playing Vax'ildan "Vax" Vessar and Caleb Widogast.