"Mark Whiting" is a main character of Cardfight!! Vanguard: Shinemon, in which he is in his third year at high school. He initially appears as a minor character in the Cardfight!! Vanguard (V Series Anime) as a history teacher at Hitsue Middle School.
Mark is not originally from Japan, but is infatuated with the country's history and culture. He moved to Japan as a child for unknown reasons, and uses his love of Japan in his profession as a history teacher. His eccentricity and quirkiness is apparent when he teaches, and he uses a Japanese history-based trading card game to teach his lessons.
His personality as a teenager is currently unknown. He is best friends with Shinemon Nitta, and uses his "18 years of history as a ninja" to help his friends.
He wears a light blue dress shirt with a dark blue vest, has black slacks, and a blue tie. His hair is spiky blond, and also wears sunglasses. He has a very long blond goatee.
As a teenager, he wears a blue school uniform similar to that of Shinemon's. Mark's uniform, however, is clearly oversized.