J. Michael Tatum
John Michael Tatum (born May 25, 1976 in McKinney, Texas, USA) is an American voice actor, ADR director and scriptwriter working for OkraTron 5000, FUNimation Entertainment/Crunchyroll, Bang Zoom! Entertainment, Sound Cadence Studios, Studio Nano and VSI Los Angeles. He is known for voicing Dororo in Sgt. Frog , France in Hetalia: Axis Powers , Scar in Fullmetal Alchemist: Brotherhood , Zarbon in Dragon Ball Z Kai , Komui Lee in D.Gray-Man , Sebastian Michaelis in Black Butler , Shizuka Dōmeki in xxxHOLiC , Rintaro Okabe in Steins;Gate , Kraft Lawrence in Spice and Wolf , Erwin Smith in Attack on Titan , Kyōya Ōtori in Ouran High School Host Club and Rei Ryugazaki in Free! - Iwatobi Swim Club .