Joanna is the former pet goanna/accomplice of poacher Percival C. McLeach, with a voracious appetite for eggs. Though she tends to think more with her stomach than her brain, she is still viciously clever, primarily due to often being mistreated verbally and physically by her ex-master. She luckily managed to escape the waterfall that McLeach fell to his doom in, and is now free to roam her natural habitat... however, having had an owner for so long, she isn't sure what to do with herself now.