A member of the Gugu-Gaga Penguin tribe. Her onesie is black. She is cocky, a crybaby, short-tempered, and clingy.

A member of the Gugu-Gaga Penguin tribe. Its onesie is gold, and it is the largest among Gugu-Gagas at 1 meter tall. While other Gugu-Gagas have the intelligence of a 2-year-old human, this one is at a 4-year-old level. A genius who is the only one in the tribe capable of addition, subtraction, and multiplication; division is apparently impossible. It recently learned about long multiplication. It is cocky, a crybaby, short-tempered, and clingy.

A member of the Gugu-Gaga Penguin tribe. Its onesie shines silver, and it is the second largest at 75cm. The only Gugu-Gaga that can draw a map of Japan on paper; it recently learned the 'A-row' of the alphabet and applied to the University of Tokyo, but failed with a score of 2 points. It is cocky, a crybaby, short-tempered, and clingy.

A member of the Gugu-Gaga Penguin tribe wearing a copper-colored onesie. The dumbest of the Gugu-Gaga tribe, yet it can recite all the digits of Pi. That is the only thing it knows. After getting furious about failing the University of Tokyo application, it once tried to bribe its way in with 200 yen (its entire life savings). It is cocky, a crybaby, short-tempered, and clingy.

Gugu-Gaga's son. He is deeply loved by Gugu-Gaga and respects and loves his mother very much. He is cocky, a crybaby, short-tempered, and clingy.

Gugu-Gaga's son, the youngest. A rare chick-type, he wears a chick onesie unlike the other Gugu-Gagas. By the way, the chick-type is an individual with a probability of 1 in 2,768,413,950,262,842. He respects and loves his mother Gugu-Gaga very much. He is cocky, a crybaby, short-tempered, and clingy.