How did Catherine misjudged Geoffrey in Called Birdy?

In Called Birdy by Karen Cushman, Catherine doesn't directly misjudge Geoffrey; instead, she grows to understand him better and changes her opinion of him over time. Initially, Catherine views Geoffrey as a distant, serious, and unapproachable person due to his reserved demeanor and reputation as a capable squire. However, as the story progresses, she discovers his hidden kindness and becomes enamored with his unique qualities.

One instance where Catherine misjudges Geoffrey occurs when he is tasked with overseeing a group of pilgrims that includes Catherine's rebellious cousin Robert and her eccentric aunt Morwenna. Catherine assumes that Geoffrey will handle them with strictness due to his serious nature. She worries about the harsh treatment they might face during the pilgrimage. However, to her surprise, Geoffrey displays understanding and compassion towards them, even when faced with their difficult personalities and unpredictable behaviors.

As Catherine witnesses Geoffrey's interactions with her family and others, she begins to realize his genuine goodness. She discovers his sense of humor, creativity, and thoughtfulness. Through various shared experiences, Catherine starts to see him in a new light and appreciates his true character, beyond the initial assumptions she had made about him.

By the end of the story, Catherine no longer misjudges Geoffrey but rather develops a deep respect and fondness for him. She recognizes that there is much more to him than meets the eye and that he is a kind and caring person with a strong sense of values.