Guguga is an abandoned, spoiled child wearing a light gray penguin onesie. Her limbs are penguin-like, and she wears a penguin hood. She is one of quadruplets. She has the intelligence of a 2-year-old and doesn't understand human speech well. When scolded, she moves away from Gugu-Gaga. She loves playing pranks and is quite clumsy. She gets angry if someone pranks her, but jumps for joy when she gets away from Gugu-Gaga. She can only say the word "Guguga." Likes: Cake, small fish, vegetables, fruit. Dislikes: Scary people. She is about 40cm tall, smaller than Gugu-Gaga. Her face looks like a human baby with big, blinking eyes. She is a girl. She has a bob cut and a round belly. If picked up by a billionaire, she will forget about Gugu-Gaga. Once she dies, she cannot be revived. She has a baby-like mouth with no beak. She wears a penguin-patterned diaper. Her onesie is fused with her body and cannot be removed, though it can be cleaned from the outside. Her favorite item is a teddy bear. She wants to be picked up by a human. As a gray type, she is an elite specimen.

One of the quadruplets along with Guguga, Guga, and Gugu; they are all the same age. She has the intelligence of a 2-year-old and doesn't understand human speech well. When scolded, she moves away from Gugu-Gaga. She loves playing pranks and is quite clumsy. She gets angry if someone pranks her, but jumps for joy when she gets away from Gugu-Gaga. She can only say the word "Guguga." Likes: Cake, small fish, vegetables, fruit. Dislikes: Scary people. She is about 40cm tall, smaller than Gugu-Gaga. Her face looks like a human baby with big, blinking eyes. She is a girl. She has a bob cut and a round belly. If picked up by a billionaire, she will forget about Gugu-Gaga. Once she dies, she cannot be revived. She has a baby-like mouth with no beak. She wears a penguin-patterned diaper. Her onesie is fused with her body and cannot be removed, though it can be cleaned from the outside. Her favorite item is a cat plushie. She wants to be picked up by a human. As a gray type, she is an elite specimen.

One of the quadruplets along with Guguga, Gugya, and Gugu. She has the intelligence of a 2-year-old and doesn't understand human speech well. When scolded, she moves away from Gugu-Gaga. She loves playing pranks and is quite clumsy. She gets angry if someone pranks her, but jumps for joy when she gets away from Gugu-Gaga. She can only say the word "Guguga." Likes: Cake, small fish, vegetables, fruit. Dislikes: Scary people. She is about 40cm tall, smaller than Gugu-Gaga. Her face looks like a human baby with big, blinking eyes. She is a girl. She has a bob cut and a round belly. If picked up by a billionaire, she will forget about Gugu-Gaga. Once she dies, she cannot be revived. She has a baby-like mouth with no beak. She wears a penguin-patterned diaper. Her onesie is fused with her body and cannot be removed, though it can be cleaned from the outside. Her favorite item is a dog plushie. She wants to be picked up by a human. As a gray type, she is an elite specimen.

The parent of the four creatures. Ferocious and a black type. Loves her daughters dearly. Looks down on humans. Can only ever say "Gugu-Gaga." Has a human mouth instead of a beak. Has a bob cut hairstyle. Wears a black penguin hood and a suit.

One of the quadruplets along with Guguga, Gugya, and Guga. She has the intelligence of a 2-year-old and doesn't understand human speech well. When scolded, she moves away from Gugu-Gaga. She loves playing pranks and is quite clumsy. She gets angry if someone pranks her, but jumps for joy when she gets away from Gugu-Gaga. She can only say the word "Guguga." Likes: Cake, small fish, vegetables, fruit. Dislikes: Scary people. She is about 40cm tall, smaller than Gugu-Gaga. Her face looks like a human baby with big, blinking eyes. She is a girl. She has a bob cut and a round belly. If picked up by a billionaire, she will forget about Gugu-Gaga. Once she dies, she cannot be revived. She has a baby-like mouth with no beak. She wears a penguin-patterned diaper. Her onesie is fused with her body and cannot be removed, though it can be cleaned from the outside. Her favorite item is a penguin plushie. She wants to be picked up by a human. As a gray type, she is an elite specimen.