Duck is an anthropomorphic, dark green mallard duck. He sports a wide yellow beak, yellow legs with webbed feet, and is usually seen in a brown tweed blazer with a red handkerchief. Duck's voice is auto-tuned, and is the intellectual of the group. He has a penchant for questioning and exploring, but is also the most blunt, insensitive and arrogant among the trio. He is egotistical and out of touch with reality, often believing himself superior to others and being the first to insult his friends.