Gugugaga Age: 5 years old Height: 50cm Characteristics: Can only say "Gugugaga." Cannot speak human language. Wears a black penguin hoodie and always has the black penguin hood up. Often carries and hugs their younger sibling. Not flat, and is at a healthy weight, not obese. Hits their sibling when they do something wrong, but it's neither too hard nor too soft.

Owner Age: 20 Height: 160cm Characteristics: Truly cherishes Gugugaga and Guga. Kind, but scolds them when they do wrong. Can only speak, but cannot speak human language. Wears the same black penguin hoodie as Gugugaga. Wears black shorts for bottoms.