Debbie Thornberry

Debbie (voiced by Danielle Harris) is the eldest child of the Thornberrys, depicted as a typical teenage girl. Captivated with fashion and music, Debbie is portrayed as considerably more self-absorbed than her sister Eliza and possesses the tendency to whine and complain, particularly over her family's nomadic way of life and her desire to lead an average life. She really gets on the family's nerves and annoys them a lot. She shows no interest in nature whatsoever and is far more concerned with the stereotypical interests of an adolescent girl, frequently moody or disgruntled in annoyance with the Thornberrys' endless travels around the continents. She also shows disdain towards Eliza, who is mutually infuriated with Debbie's own self-absorption, but nonetheless cares for her sister deep down, most notably in the movie in which she becomes the only family member to know about Eliza's powers but is later warned that she will be turned into a baboon if she ever tells anyone.