Cubbi is part of a small caretaker colony of Gummi Bears who were left to guard Gummi Glen. He is incredibly curious and has a tendency to get distracted by the mysterious or the exciting. Of all the bears, he is the youngest and the smallest. Because of his age, his opinion is sometimes overlooked during discussions. Cubbi dreams of becoming a great Gummi Knight. He later becomes best friends with the human, Cavin, who shares the dream of becoming a knight.