Kirk Thornton. Actor: Perfect Blue. Kirk Thornton is an American voice actor who voiced in several animated series and video games including Shadow the Hedgehog, Saix and Isa from Kingdom Hearts, Brandon Heat in Gungrave, Hotohori in Fushigi Yugi, Klein in Sword Art Online, Hajime Saito in Rurouni Kenshin, Don Patch in Bobobo-bo Bo-bobo, Ensign Nogami in The Cockpit and Digimon.