From 2010 to 2018, he was the voice of Knuckles the Echidna in the Sonic the Hedgehog series. He also voices Thor in several Marvel projects and King Roland II in Disney Junior's Sofia the First.

Ace in the Funimation re-dub of One Piece and Takashi Morinozuka in Ouran High School Host Club. His other notable roles include Yu Kanda in D.Gray-man, Cleo in Glass Fleet, Ginko in Mushishi, Portgas D. Willingham rose to prominence in the voice acting world for his portrayal of Roy Mustang in Fullmetal Alchemist, which he later reprised in Fullmetal Alchemist: Brotherhood. He moved to Los Angeles in the early 2000s to pursue an acting career. He later graduated from Woodrow Wilson High School, and studied at Texas Christian University. After sixth grade, he moved from a private school to J.R. He became interested in acting in fifth grade. He is a regular cast member of the web series Critical Role, in which he and other voice actors play Dungeons & Dragons, and has served as the inaugural CEO of Critical Role Productions since 2019. Willingham's video game roles include Guile in the Street Fighter franchise, Knuckles the Echidna in the Sonic the Hedgehog franchise, and Thor in various Marvel games.

Gray-man, and Cameron Campbell in Camp Camp. Ace in One Piece, Takashi 'Mori' Morinozuka in Ouran High School Host Club, Yu Kanda in D. Some of his notable anime roles include Roy Mustang in Fullmetal Alchemist and Fullmetal Alchemist: Brotherhood, Cleo in Glass Fleet, Ginko in Mushishi, Portgas D. Travis Willingham is an American voice actor.

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