Matthew Mercer

In Ufotable's English-language production of "Demon Slayer: Kimetsu no Yaiba," Mercer voices Kagaya Ubuyashiki, the calm and revered leader of the Demon Slayer Corps, along with the Tongue Demon and the Horned Demon. The part places the gentle, authoritative Ubuyashiki among a deep catalog of anime leads and antagonists that Mercer has built since 2002, a list that includes Levi Ackerman in Attack on Titan, Kiritsugu Emiya in Fate/Zero, Jotaro Kujo in JoJo's Bizarre Adventure, Yamato in Naruto, Trafalgar Law in One Piece, Hit in Dragon Ball Super, and Leorio in Hunter x Hunter. His command of restrained, commanding figures suits Ubuyashiki, whose quiet presence anchors the Corps.

Born Matthew Christopher Miller, Mercer has worked as a voice-over artist across video games and animation since 2002. His game credits are extensive and span many major franchises, including Leon S. Kennedy in Resident Evil 6, Kurtis Stryker in Mortal Kombat, Chrom in Fire Emblem, Jack Cooper in Titanfall 2, Cole Cassidy in Overwatch, Yusuke Kitagawa in Persona 5, Goro Majima in Like a Dragon, Ganondorf in The Legend of Zelda: Tears of the Kingdom, Espio the Chameleon in the Sonic the Hedgehog series, Shroud in Dispatch, and Vincent Valentine in Final Fantasy VII Rebirth. The breadth of these roles has made him one of the more recognizable performers in contemporary English-language game and anime dubbing.

Beyond voice acting, Mercer developed and has served as Dungeon Master for the Dungeons & Dragons web series Critical Role since its 2015 premiere, and he is the chief creative officer of Critical Role Productions. As a tabletop game designer, he has contributed to role-playing books including Explorer's Guide to Wildemount (2020), Tal'Dorei Campaign Setting Reborn (2022), Critical Role: Call of the Netherdeep (2022), and Daggerheart (2025). These ventures have established him as a prominent creative voice in modern tabletop gaming as well as in animation.