Freder Frederson is just a man or the son of the mastermind of metropolis who found a kindhearted girl at the undergrounds while the kindhearted girls explains the tower of babel. Freder falls in love with the girl. One Night freder has nightmares while he's in a crucified vision the reason why because he was asking the 7 deadly sins.
At the last part on the film Freder fights Rotwang to death. At the last Freder and The Kindhearted girl are married.
Freder was played by Gustav Frolich