Brobee

Brobee is a little green monster.  He is the only "primary" character whose facial expression changes depending on what situation he is in, his normal smile turning into a frown, and vice-versa. He is often subjected to trying new foods. His realm is a vast forest. He is one of the only characters (if not the only) to have their age mentioned (4). He is also the drummer for the Gabba band.