Kari Wahlgren (born July 13, 1977) is an American voice actress who has provided English-language voices for over a hundred cartoons, anime and video games. She got her start in anime voice-overs as Haruko Haruhara in FLCL, and would later land major roles in a number of shows and films: Robin Sena in Witch Hunter Robin, Lavie Head in Last Exile, Fuu in Samurai Champloo, Scarlett in Steamboy, Pacifica Casull in the Scrapped Princess, Saya Otonashi in Blood+, Kagami Hiiragi in Lucky Star, Saber in Fate/zero and Fate/stay night: Unlimited Blade Works, and Celty Sturluson in the Durarara!! series.