Chiku is a female monkey that lives in Celesteville with her father and wears a light pink shirt and magenta colored pants with white shoes. She is also good friends with Badou.
She is an inventor and likes to figure out how things work. There are times when her tongue makes her bite more than she can chew, but she pulls through in the end. It is revealed in Kite Fight that Chiku easily distracted by new ideas for other inventions instead of focusing on what really matters. On occasion she can shown to be sneaky in "Spy Trap" and "Hidden Courtyard". She has a tendency to repeat herself in "Soaped", "The Celesteville Junior Marching Band and Heropotamus."