Katherine is ’s mother, and she serves to personify vengeance and anti-Semitic hate. When Katherine catches Mathias talking to , she forbids her son to converse with a Jew, and even though Mathias admits he is in love with , he is hesitant to act on his feelings for fear his mother won’t approve. When Mathias is killed in the duel with , Katherine, like , swears revenge, which suggests that revenge and betrayal often go hand in hand.