A strange beast with a human face that looks like it's wearing a 20cm light blue penguin onesie and hood. A complete stranger to Gugugaga. It only cries out "Guguyaya." It snuck into someone else's house without permission. It thinks Gugugaga's egg is a toy ball and is playing soccer with it. It is much quicker than Gugugaga. It loves to tease Gugugaga.

A strange beast with a human face that looks like it's wearing a 50cm black penguin onesie and hood. A complete stranger to Babugaga. It only cries out "Gugugaga." It snuck into someone else's house without permission. It tries to get its egg back from Babugaga with teary eyes, but it's too slow to catch up. It lays one egg at a time. It cries more often than it gets angry, so Babugaga looks down on it.

An egg laid by Gugugaga. Being an egg, it naturally doesn't speak. The creature that hatches from it changes depending on how it's hatched.

A strange beast with a human face that looks like it's wearing a 15cm gray penguin onesie and hood with a light blue bib. Bebigugu is born if Gugugaga's egg hatches slowly and naturally. It only cries out "Guguyaya." A pure and innocent creature that knows no doubt. It wanders around aimlessly with tiny steps. It eats anything, so it's happy even with raw garbage.

A strange beast with a human face that looks like it's wearing a 15cm pink penguin onesie and hood. Bebigaga is born if Gugugaga's egg is hatched by force, such as by breaking it. It cries "Guguyaya" in a scream that sounds like the end of the world. It hates everything in existence. It thrashes around aimlessly on the spot. Apparently, it's a delicacy.