Who is Christophe from Black Like Me and what is their importance?

Griffin meets Christophe, a young black man, on the bus while traveling through Mississippi. He makes Griffin extremely uncomfortable when he causes a fight on the bus and then becomes overly emotional. Cristophe can speak a number of different languages, and we soon learn he has just been released from prison. He confides in Griffin and says that he hates other black people. Christophe is a representation of a black person who has grown to hate his own race.