Chiko-chan is a fictional character from the Japanese television program "Chiko-chan ni Shikarareru!" She is a curious and lively young girl with distinctive pink hair and large round eyes. Chiko-chan is known for her inquisitive nature and her catchphrase, "Why don't you know that?" which she uses to challenge adults with questions about everyday life and knowledge. Her character serves as a catalyst for exploring interesting facts and trivia, often leading to humorous or enlightening discussions. The series is educational and entertaining, appealing to a wide audience.