Yūki Kaji (梶 裕貴 Kaji Yūki, born September 3, 1985) is a Japanese voice actor and singer affiliated with the agency VIMS. He has voiced many notable roles, such as Eren Yeager in Attack on Titan, Lyon Vastia in Fairy Tail, Issei Hyodo in High School DxD, Shu Ouma in Guilty Crown, Alibaba in Magi: The Labyrinth of Magic, Kazuya Ichinose and Akio Fudou in Inazuma Eleven: Orion no Kokuin, Clemont in Pokémon XY, Meliodas and Zeldris in The Seven Deadly Sins, Yukine in Noragami, Speed-O'Sound Sonic in One-Punch Man, Kanato Sakamaki in Diabolik Lovers, Todoroki Shōto in My Hero Academia, Kozume Kenma in Haikyu!!, and Koichi Hirose in JoJo's Bizarre Adventure. He was part of the four-unit singing group G.Addict, which was part of the Goulart Knights project, and has acted as one of the main protagonists in the movie Kami Voice: The Voice Makes a Miracle. He won the Best Rookie Actor Award in the 3rd Seiyu Awards in 2009. He won the Best Voice Actor Award two years consecutively in the 7th Seiyu Awards and 8th Seiyu Awards, in 2013 and 2014. He has hosted the web radio show Yūki Kaji's Monologue (梶裕貴のひとりごと Kaji Yūki no Hitorigoto) since March 2014. His variety show Kaji 100!: The 100 Things Yuki Kaji Wants to Do debuted on the Nitteleplus channel in April 2017.