Danny Vinyard is a fictional character from the film "American History X," portrayed by actor Edward Furlong. He is the younger brother of Derek Vinyard, who is played by Edward Norton. Danny is initially influenced by his brother's extremist views and becomes involved in a white supremacist gang. Throughout the film, Danny's character undergoes significant development as he grapples with the consequences of hate and violence. After Derek is released from prison, Danny begins to question the beliefs he once held, leading to a powerful exploration of redemption and the impact of family dynamics on personal choices.