A Gugu-Gaga penguin wearing a costume. The parent of Child Gaga, who will protect their offspring at any cost. Lays three eggs every three months. Has a kind personality, but if you approach the children or eggs, they will spread their wings and plead "stop it" with slightly teary eyes. If the children or eggs are crushed or killed, they will memorize your face and might kill you in your sleep.

A Gugu-Gaga penguin wearing a costume. Never leaves Parent Gaga's side. Clings to Parent Gaga when scared. Despite this, they are very curious. They show interest in and approach strange mushrooms and humans alike. They are small, standing only 25cm tall.

A subspecies of Gugu-Gaga penguin. Wears a chick costume, making them look slightly different from standard Gugu-Gaga penguins. However, aside from appearance, they are the same as other Gugu-Gagas. The pet of the Gugu-Gagas. Follows Leader Gaga around.

Doro. Pink Gaga's friend. More reliable than the average Gugu-Gaga. Basically serves as the substitute leader whenever Leader Gaga is in trouble.

A Gugu-Gaga penguin. Wears a costume, but the color is pink. Doro's friend. Doesn't stand out much, but always has something useful when needed or comes up with sudden flashes of inspiration.

A Gugu-Gaga penguin wearing a costume. The leader of the group. A reliable presence. Constantly looking for a place to sleep. Having gotten lost in Japan, they are asking various people for help to return to their homeland, Gugu-Gaga Land.