Clara is the able assistant of the Wise Gnorbu who runs the Lunar Temple in Shenkuu. She often manages to find things that her elderly master misplaces around the temple, and is his star pupil. When the Wise Gnorbu discovered something was wrong with Neopia, she insisted that she went with Roxton on a mission to save the planet, claiming she wasn't afraid of a little danger. Clara is originally from Brightvale, and volunteered in the royal library there. She moved to Shenkuu along with the rest of her family.
I'm not afraid of a little danger.
Oh goodness, I'm so worried about Roxton! Would you help make sure he makes it through the tunnels okay?! You'll be rewarded as a token of our appreciation!
She was referred to as both Chatham and Cheltham during the plot, though it seems Chatham is her real name.