Katherine is the daughter of Charles VI of France.
She is aware from the start of the war that she is likely to be married off to Henry in any peace treaty, and starts to learn English as soon as she can. A demure girl, she is shocked by how gross and vile English sounds, but is still a quick learner. She is at first uncertain of whether she actually wishes to marry Henry, though she accepts the need, but he manages to charm her, if only by making her laugh at his terrible French. She still finds him a bit shocking in the speed with which he moves on with this.