Margarete’s brother and a soldier, Valentine is outraged by the knowledge that his sister has compromised her honor by taking on a secret lover (Faust). Outside of his mother and sister’s house, he challenges Faust to a duel, but with Mephistopheles’s magical aid Faust mortally wounds the soldier. Before he dies, Valentine tells his sister that she might as well become a whore. He wishes he could kill her himself, and tells her that in her dishonor she gave his heart the fatal blow.