Gruffi is an old-fashioned bear who prefers to do things "the Gummi way" and the de facto leader of Gummi Glen. An extremely skilled craftsman and mechanic, he is the one that often fixes the old Gummi technology and trap doors, as well as building traps around the Glen to deal with humans and ogres. When it comes to building and using tools, he is a perfectionist, which can be his undoing at times. In the first episode, he was distrustful of Cavin, but later on in the same episode, he unknowingly admitted that he secretly liked him. However, at other times, Gruffi is often the voice of stability when the other Gummis fall into despair.