Sylvia Christel (シルヴィア・クリステル, Shiruvia Kurisuteru) is a character in both installments of the No More Heroes video game series. She is introduced as the 24-year-old ranking agent for the United Assassins Association, and the wife of Henry Cooldown. Christel is of Scandinavian descent, although she speaks using a French accent. Described in official literature as "mysterious" and "cold," she provides ranks and sets up Ranking Battles for UAA members. Sylvia Christel was based on American actress Scarlett Johansson, while her name is an allusion to European adult actress Sylvia Kristel.