He is Charlotte Hazelrink's fiance. In the anime, he serves as the primary villain. He also has an affair with Josephine. He likes to wear glasses and has a tendency to make flashy entrances. He hates Arima and wants to kill Teppei for vengeance. Hartmann is also the most successful businessman in Charlotte's nation and one of the chief traders with Arima's company. He is also the killer of Teppei's parents.