Liam O'Brien

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. 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 and its sequel, Caius Ballad in Final Fantasy XIII-2 and Lightning Returns: Final Fantasy XIII, War in Darksiders, Allen Lee in Fallout 4, 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, Grimoire Weiss in Nier, the Warden in For Honor, Dimitri Allen and Clark Triton in the Professor Layton series 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.

• Name — Liam O'Brien • Born — 28 May 1976 • Birthplace — Weehawken, New Jersey, U.S. • Occupation — Voice actor, writer, director • Years Active — 2001–present • Children — 2

Liam Christopher O'Brien was born in Weehawken, New Jersey, on May 28, 1976. He is of Irish ancestry. His mother, Lois Wiltse O'Brien, worked as an educator as well as a quality assurance trainer and consultant. He has a sister named Cara. His family were Reformed Christians, and he was "raised by a Christian mother and attended 15 years of Christian schooling", but would later describe himself as agnostic. He began acting in high school at St. Peter's Preparatory School, resolving to "just be a starving artist" as he knew the chances of success in the field were low. O'Brien moved to New York City to attend the New York University Tisch School of the Arts.

In his early career, O'Brien worked in theater on various productions around the country. He met Crispin Freeman while working on a production of Shakespeare's R&J in Cincinnati, Ohio, which helped him get voice-over work back in New York. He and his partner decided to leave the city in the aftermath of the September 11 attacks and pursued a voice acting career. While he enjoyed theater, he gave up on it as the voice work would better allow him to support and spend time with his family. 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 "extremely 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 is also a cast member of the popular web series Critical Role, in which he and other voice actors play Dungeons & Dragons. Critical Role was both the Webby Winner and the People's Voice Winner in the "Games (Video Series & Channels)" category at the 2019 Webby Awards; the show was also both a Finalist and the Audience Honor Winner at the 2019 Shorty Awards. After becoming hugely successful, the Critical Role cast left the Geek & Sundry network in early 2019 and set up their own production company, Critical Role Productions. Soon after, they aimed to raise $750,000 on Kickstarter to create an animated series of their first campaign, but ended up raising over $11 million. In November 2019, Amazon Prime Video announced that they had acquired the streaming rights to this animated series, now titled The Legend of Vox Machina, and O'Brien reprised his role as Vax'ildan. In June 2021, O'Brien was added to the cast of Exandria Unlimited, a spinoff of Critical Role. O'Brien is also one of the narrators for the audiobook edition of the novel Critical Role: Vox Machina – Kith & Kin (2021). O'Brien was the author of Critical Role: Der Katzenprinz & Other Zemnian Tales, with illustration by Charlie Borovsky; the in-universe fairy-tale collection was released on April 8, 2025.

O'Brien married voice actress Amy Kincaid in 2002. The couple have two children: a daughter and a son. They live in Los Angeles. He suffers from hyperacusis, a hearing disorder that makes him unusually sensitive to everyday noises.

List of voice performances in anime • Year — Title — Role — Notes — Source • Boogiepop Phantom — Yoji Suganuma, others — CA Crystal Acids English Voice Actor & Production Database • Gokudo — Tei • His and Her Circumstances — Hideki Asaba, Fukada Kohei • Revolutionary Girl Utena — Mamiya Chida • Figure 17 — Toru • Wolf's Rain — Soldier • DNA² — Junta Momonari — CA • K.O. Beast — Bud Mint • Yukikaze — Various characters • Texhnolyze — Haruhiko Toyama •.hack Legend of the Twilight — Tom • Gad Guard — Truck Driver • R.O.D. — Various characters — Also as William Markham • Ghost in the Shell: Stand Alone Complex • Paranoia Agent — Mitsuhiro Maniwa, Man on Phone 2 • Comic Party — Taishi Kuhonbutsu • Gungrave — Executive A, Researcher, Sam • Marmalade Boy — Akira Mizutani, Alex • Girls Bravo — Kazuharu Fukuyama • Rumiko Takahashi Anthology — Ryuichi, Mover, Odagiri, Zashiki Warashi, Gorgeous — CA • Mermaid Forest — Yuta • Samurai Champloo — Young Yamane, Eel Shop Owner, others • Daphne in the Brilliant Blue — Various characters • Koi Kaze — Kei Odagiri, Man, Friend A • Duel Masters: Season 2 — Shobu Kirifuda • Tenjho Tenge — Shin Natsume • The Melody of Oblivion — Horu, Person of the Cape • Mermaid Forest — Yuta, others • DearS — Various characters • Ghost Talker's Daydream • Ghost in the Shell: Stand Alone Complex 2nd GIG — Gino, others • Gankutsuou: The Count of Monte Cristo — Andrea Cavalcanti • Saiyuki Reload — Various characters • Scrapped Princess — Furet • Leave it to Piyoko! — Thin Blob — OVA • Boys Be... — Makoto Kurumizawa — Voice director and script writer • Kannazuki no Miko — Tsubasa — CA • Saiyuki Reload Gunlock — Rin's Captor, Subordinate • Gun Sword — Ray Lundgren, Wild Bunch C • Kamichu! — Shika, Inu Osho, Konoha Kamaitachi, others • The Prince of Tennis — Nanjiro Echizen, Arai • Fate/stay night — Archer • Ergo Proxy — Vincent Law • Paradise Kiss — Seiji Kisaragi • –07 — Haré+Guu — Dr. Clive • –09 — Naruto — Gaara, Kotetsu Hagane — CA • 2007 — Blue Dragon — Dolsk • To Heart — Various characters • Cutie Honey — Seiji's Contact — Live-action dub • The Melancholy of Haruhi Suzumiya — Baseball Team Captain • The Third: The Girl With the Blue Eye — Various characters • Phoenix — Ohtomo • –14 — Bleach — Jushiro Ukitake, Sora Inoue • Code Geass series — Lloyd Asplund • Buso Renkin — Gota Nakamura, Hideki Okakura • Descendants of Darkness — Hisoka Kurosaki • –10 — Monster — Kenzo Tenma • –19 — Naruto: Shippuden — Gaara • Slayers series — Rezo — Revolution and Evolution-R • 2012–22 — Tiger & Bunny — Lunatic / Yuri Petrov • rowspan="2" — | Fate/Zero — Kariya Matou • Nura: Rise of the Yokai Clan — Hidemoto Keikain & Shōei • 2013–14 — Magi: The Labyrinth of Magic — Jamil, Markkio and Issac • –15 — Digimon Fusion — Deckergreymon, Neptunmon, Mercurymon, others • –15 — Sailor Moon — Nephrite — Viz dub • Mobile Suit Gundam: The Origin — Gihren Zabi — • Sailor Moon Crystal — Nephrite • Sengoku Basara: End of Judgement — Ieyasu Tokugawa — • –19 — Baki — Atsushi Suedou, Valentin Sokolov — Netflix ONA Original net animation • Ultraman — Dan Moroboshi • –23 — Boruto: Naruto Next Generations — Gaara • Marvel Future Avengers — Red Skull, Doctor Strange • 2023 — Baki Hanma — Atsushi Suedou

List of voice performances in animation • Year — Title — Role — Crew role, notes — Source • –09 — Wolverine and the X-Men — Warren Worthington III / Angel / Archangel, Nightcrawler, Nitro • G.I. Joe: Renegades — Captain Anatoly Krimov / Red Star, others — Episode: "Union of the Snake" • 2012–14 — NFL Rush Zone — RZ6.0/Richard Zimmer, Zich, others • 2012–18 — Sofia the First — Additional voices — 2 episodes • Phineas and Ferb: Mission Marvel — Red Skull • –17 — Avengers Assemble — Red Skull / Iron Skull, Stephen Strange / Doctor Strange, Blood Brother #2, additional voices • Regular Show — Tango — Episode: "Gold Watch" • –15 — Hulk and the Agents of S.M.A.S.H. — Arkon, Red Skull, others • –17 — Star Wars Rebels — Supply Master Yogar Lyste, Morad Sumar, others • Transformers: Robots in Disguise — Underbite, Kickback, others • Ultimate Spider-Man — Doctor Strange — Episode: "Miles from Home" • Pickle and Peanut — Head Mannequin — Episode: "Bats/Movie Camp Out" • Amphibia — Additional voices — 3 episodes • Carmen Sandiego — Professor Gunnar Maelstrom, Vlad, Boris, ACME Agent. • DC Super Hero Girls — General Zod — 3 episodes • 2020 — Spider-Man — Doctor Strange — 2 episodes • 2021 — Dota: Dragon's Blood — Nikdo, Bandit #1, Bandit #4 — Episode: "Princess of Nothing" • Star Wars: The Bad Batch — Bolo, Raney, Captured Falleen, Tactical Droid, Scrapper — 3 episodes • 2022–present — The Legend of Vox Machina — Vax'ildan "Vax" Vessar, Vorugal, Various voices — Executive producer and writer • 2023–2024 — Star Wars: Young Jedi Adventures — Estala Maru, Onderrs, Galjaero Pirate — 3 episodes • 2025–present — The Mighty Nein — Caleb Widogast — Executive producer • The Dragon King — Luna Devorans — In production; funded by a Kickstarter campaign

List of voice performances in other dubbing • Year — Title — Role — Crew role, notes — Source • One Missed Call — Hiroshi Yamashita — CA

List of voice performances in video games • Year — Title — Role — Crew role, notes — Source • Seven Samurai 20XX — Natoe • Obscure — Kenny Matthews • 2005 — Castlevania: Curse of Darkness — Isaac • Tales of the Abyss — Dist the Rose • Dirge of Cerberus: Final Fantasy VII — Incidental characters • Valkyrie Profile 2: Silmeria — Lezard Valeth • –07 —.hack G.U. series — Endrance — Rebirth, Reminisce, Redemption • –18 — Naruto video games — Gaara, Kotetsu Hagane • rowspan="3" — | Eternal Sonata — Waltz • Jeanne d'Arc — Luther • World of Warcraft: The Burning Crusade — Illidan Stormrage, Talon King Ikiss, Darkweaver Syth • –present — Persona (series) — Akihiko Sanada, Officer Kurosawa (3R) • Devil May Cry 4 — Sanctus — Also did the motion capture for Sanctus • Professor Layton and the Unwound Future — Dr. Alain Stahngun / Dimitri Allen • Tales of Vesperia — Cumore • Final Fantasy IV — Kain Highwind — 3D remake • Command & Conquer Red Alert 3 — Akula Submarine — (Voice) • World of Warcraft: Wrath of the Lich King — Marwyn • Dragon Age: Origins — Additional voices • Kamen Rider: Dragon Knight — Wrath, Trash Mob B • Magna Carta II — Huaren Jass • Resident Evil 5 — Reynard Fisher, others • MadWorld — Additional voices • Terminator Salvation — Resistance Fighter • Undead Knights — Lord Follis • Red Faction: Guerrilla — Daniel Mason • The Saboteur — Additional voices • Lost Planet 2 • Final Fantasy XIII — Cocoon Inhabitants • Darksiders — War • Call of Duty: Black Ops — USA Soldier • Sengoku Basara: Samurai Heroes — Ieyasu Tokugawa • Fallout: New Vegas — Various characters • Fable III — Walla Voice Actors • NieR — Grimoire Weiss, additional voices — Uncredited in Gestalt's endgame credits; also in Replicant ver.1.22474487139... • Supreme Commander 2 — Jaran Kael — Aeon Illuminate character • Kane & Lynch 2: Dog Days — Mercenary • Mafia II — Brian O'Neill • Valkyria Chronicles II — Baldren Gassenarl • World of Warcraft: Cataclysm — Illidan Stormrage • StarCraft II — Ghost (Terran Unit) • Captain America: Super Soldier — Howard Stark, Allied, Hydra • Catherine — Orlando Haddick — Reprises role in the 2019 remake/expansion Catherine: Full Body • Dissidia 012 Final Fantasy — Kain Highwind • Killzone 3 — Voice Talent ISA • Dungeon Siege III — Alexei / Roderick / Additional voices • Rise of Nightmares — Marchosias • Uncharted 3: Drake's Deception — Hired Thugs • White Knight Chronicles 2 — Madoras • Professor Layton and the Last Specter — Clark Triton • The Lord of the Rings: War in the North — Eredan / Elledan / Elrohir • Call of Duty: Modern Warfare 3 — Additional voices • Asura's Wrath — Asura • Prototype 2 — Additional voices • Final Fantasy XIII-2 — Caius Ballad • NeverDead — Alex • Binary Domain — Additional voices • Darksiders II — War • Skullgirls — Leviathan • Spec Ops: The Line — Marines, Exile Officer • World of Warcraft: Mists of Pandaria — Sha of Violence, Chi-Ji • Resident Evil 6 — Civilians • Call of Duty: Black Ops II — Multiplayer Voice Talent — Also voiced David "Section" Mason in E3 Demo • Fire Emblem Awakening — Inigo • Aliens: Colonial Marines — Dr. Richard "Rick" Levy • Tomb Raider — Solarii • League of Legends — Yasuo • BioShock Infinite — Additional voices • Fuse — Guards • The Last of Us — The Infected, Additional voices • The Bureau: XCOM Declassified — Nico DaSilva, Sectoid • Saints Row IV — The Voices of Virtual Steelport • Killer Is Dead — David, Narrator • Marvel Heroes — Electro, Nightcrawler, Havok, Angel • Republique — Station 14 — Episode 3: "Ones and Zeroes" • Batman: Arkham Origins — S.W.A.T. Officers • Grand Theft Auto V — The Local Population • Infinity Blade III — Additional voices • D4: Dark Dreams Don't Die — Phillip Cheney • Hearthstone — Illidan Stormrage • Lightning Returns: Final Fantasy XIII — Caius Ballad • Middle-earth: Shadow of Mordor — Gollum • inFamous: Second Son — Male Pedestrian #4 • The Evil Within — Valerio Jimenez, Male Villager, Obese Zombie • Space Run — Buck Mann • The Elder Scrolls Online — Male Breton #1, Male Bosmer, Skeleton • Skylanders: Trap Team — Luminous • Lego Batman 3: Beyond Gotham — Black Hand, Deathstroke, Dr. Fate, Etrigan The Demon, Mr. Freeze, Red Tornado, Reverse-Flash, The Question — Credited under "Voice Talent" • Transformers: Rise of the Dark Spark — Autobot Flyer, Decepticon Soldier 02 • How to Train Your Dragon: School of Dragons — Tuffnut • Final Fantasy Type-0 HD — Enkidu • Saints Row: Gat out of Hell — William Shakespeare, Vlad the Impaler, Demons, Husks • The Order: 1886 — Finley • Mad Max — Gutgash • Transformers: Devastation — Motormaster, Seeker #3 • Heroes of the Storm — Illidan Stormrage • -17 — Lego Dimensions — Credited under "Voice Talent" • The Witness — N/A — Voice director • Lego Marvel's Avengers — Red Skull • Fallout 4: Far Harbor — Allen Lee, Keith McKinney, Knight-Captain Larsen • Space Run: Galaxy — Buck Mann • Street Fighter V — Gill — Appears in later revision of closing credits, playable as DLC character in 2019 • World of Warcraft: Legion — Illidan Stormrage • Titanfall 2 — Robert "Barker" Taube • For Honor — The Warden (Male) • Horizon Zero Dawn: The Frozen Wilds — Umnak • Injustice 2 — Reverse-Flash, Brainiac 5 • Marvel vs. Capcom: Infinite — Doctor Strange • Middle-earth: Shadow of War — Gollum, Daughter's Suitor • Sonic Forces — Infinite • Dissidia Final Fantasy NT — Kain Highwind • Pillars of Eternity II: Deadfire — Vax'ildan Vessar, Serafen — Critical Role DLC • Fallout 76 — Knight Tex Rogers, Doctor Kessle, Ranger Simon • Marvel Powers United VR — Doctor Strange • Darksiders III — War • Marvel Ultimate Alliance 3: The Black Order — Black Bolt, Destroyer, Doctor Strange, Nightcrawler, Red Skull • Marvel Dimension of Heroes — Doctor Strange — Augmented reality game for mobile devices • Death Stranding — AI Voice, Veteran Porter • DOOM³: BFG Edition — Voice performers — Remaster • 2020 — Gears Tactics — Richard Prescott • The Last of Us Part II — The Infected, Firefly on the radio, additional voices • Kingdoms of Amalur: Re-Reckoning — Assyr • 2022 — Guild Wars 2: End of Dragons — Archemorus • Return to Monkey Island — Quarantined Pirate • 2023 — Guild Wars 2: Secrets of the Obscure — Mabon • 2024 — Alone in the Dark — Herr Stern • Marvel Rivals — Doctor Strange • 2025 — Date Everything! — Friar Errol • Dispatch — Lightningstruck • 2026 — Trails in the Sky 2nd Chapter — Weissman the Faceless • Castlevania: Belmont's Curse — Isaac

List of acting performances • Year — Title — Role — Notes — Source • The Phoenix Incident — Jacob Reynolds • Web series • 2015–present — Critical Role — Vax'ildan "Vax" Vessar (campaign 1) — Cast member; creator-owned actual play web series • Caleb Widogast (campaign 2) • Orym of the Air Ashari (campaign 3) • Halandil Fang (campaign 4) • 2017 — Sagas of Sundry: Madness — Emmett Markham — Main role. An anthology limited series. • – — All Work No Play — Himself — A web series where O'Brien and Sam Riegel catch up over a drink and try a new activity each episode. The show was developed from their original AWNP podcast (2012–2017). • AWNP: Unplugged — Himself — A spinoff web series during the COVID-19 pandemic where Riegel and O'Brien caught-up via video chat. • Exandria Unlimited — Orym of the Air Ashari — Main role; 8 episodes. An anthology spinoff series of Critical Role. • 2023–2024 — Candela Obscura: The Circle of Tide & Bone — Cosmo Grimm — Main role; 3 episodes. An anthology limited series. • 2024 — Candela Obscura: The Circle of the Crimson Mirror — Game Master — Main role; 3 episodes. An anthology limited series. • Moonward — Walden Orlock — Main role; a spinoff limited series of Midst. • 2025 — Exandria Unlimited: Divergence — Erro Mordaurum — Main role; 4 episodes • Age of Umbra — Skreev — Actual play limited series using the Daggerheart system

Liam O'Brien is recorded as actor, screenwriter and film director.