Coo Erhard

Coo is thirteen and the Major of the Black Gema Gema Gang. He is the physician of the group. He is Piyoko039s childhood friend and is closest to her. Sometimes if food flies through the air he will jump up and catch it in his mouth in a doglike manner. As the gang considers themselves a quotfamilyquot Coo is considered the quotbrotherquot. However Piyoko thinks she is older than him although she is only 8 while he is 13. From Wikipedia