Catherine, a very agreeable Woman by Shakespear's account.

Catherine has only two scenes in Henry V.

Act 3, Scene 3 in which Catherine agreeably learns English (at specific body parts). I have never seen HV, but I imagine this scene is a bit of comedy and therefore an agreeable interlude.

In Act 5, Scene 2, Catherine agrees to marry Henry. Setting up what is believed to be an agreeable marriage between the two.

Actually, Henry asked for a large dowry both in money and lands in addition to the hand of Catherine, and when these demands were rejected war broke out. (Leading to the Battle of Agincourt)

When peace was eventually made Henry and Catherine were betrothed, and the marriage finally took place. The following year she gave birth to the future King Henry VI.

After Henry's death, Catherine's name soon began to be coupled with that of Owen Tudor, a Welsh gentleman. Catherine and Tudor were quietly married. They lived in obscurity till 1436, when Tudor was imprisoned,and Catherine retired to Bermondsey Abbey, where she died.