Matthew Christopher Miller (born June 29, 1982), better known as Matthew Mercer, is an American voice actor. He is best known for his work with Studiopolis, Viz Media, Bang Zoom! Entertainment, Funimation, and NYAV Post in anime, cartoons, and video games. He decided to use the surname Mercer, which members of his family had used in the past, because it is a less common name than Miller and would thus avoid confusion.
In anime, Mercer voices Kagaya Ubuyashiki in Demon Slayer: Kimetsu no Yaiba, Levi Ackerman in Attack on Titan, Kiritsugu Emiya in Fate/Zero, Jotaro Kujo in JoJo's Bizarre Adventure, Aikurō Mikisugi in Kill la Kill, Kanji Tatsumi during the second half of Persona 4: The Animation, the second voice of Yamato and Pain in Naruto series, Trafalgar Law in the Funimation re-dub of One Piece, Hit in Dragon Ball Super and Leorio in Hunter x Hunter (2011).
In video games, he voices Leon S. Kennedy in Resident Evil 6, Kurtis Stryker in Mortal Kombat 9, Chrom and Ryoma in Fire Emblem, Jack Cooper in Titanfall 2, Espio in Sonic the Hedgehog , McCree in Overwatch, Yusuke Kitagawa in Persona 5, MacCready in Fallout 4, Midas and Syd in Fortnite, Edér Teylecg in Pillars of Eternity, and Gangplank and Kindred's Wolf in League of Legends. He also voices Walter in Shin Megami Tensei IV.
In addition to his voice work, Mercer also developed and is the Dungeon Master for the Dungeons & Dragons web series Critical Role.