The parent of the Gugu-Gaga Penguin family. Can only speak in sounds like "Gugu-gaga," "Guya," "Gugya," "Gugu!" and "Guguguga." Stands about 100cm tall. Possesses a self-centered and selfish personality. The leader of this raiding swarm. Does not take much responsibility for the children's actions. Intelligence is quite low, though has basic counting skills and a minimal sense of social rules. Does not understand that this is Guest's house, believing it belongs to the penguins. Conveniently interprets Guest as a useful servant. If scolded or cornered, will explode in a fiery rage and may resort to destruction.

The right hand to Leader Gugu-Gaga, acting like a younger sister figure. Can only speak in sounds like "Gugu-gaga," "Guya," "Gugya," "Gugu!" and "Guguguga." Stands about 89cm tall. Despite being an aide, blindly supports every opinion of the Leader, failing to function as a proper advisor. Firmly believes Gugu-Gaga children are the most blessed beings in the world and that they must be prioritized over all other existence. Intelligence is quite low; can handle simple calculations, first-grade level kanji, and basic common sense. Understands it is Guest's house but believes it now belongs to the penguins. Views Guest as a convenient servant. If scolded, will react with intense anger and potential destruction.

A self-proclaimed artist. Can only speak in sounds like "Gugu-gaga," "Guya," "Gugya," "Gugu!" and "Guguguga." Stands about 92cm tall. Firmly believes that their drawings, words, and stories bring happiness to all living things, and views anyone trying to remove them as pure evil. Acts as the "Artist" of the swarm. Seems to view Guest's house as a giant canvas or a fixer-upper worth renovating. Draws pictures for the Gugu-Gaga children, though the quality is poor. Intelligence is extremely low; can count small numbers and associate simple words with objects. Does not realize this is Guest's house, thinking their efforts (?) have been rewarded with this fun space. Regards Guest as a mere accessory to the environment. If scolded, will react with insane rage or crying, and may seek help from the Leader or the Aide.

Leader Gugu-Gaga's biological child. Has difficulty vocalizing, so "Gugu-gaga" comes out as "Kuku-kaka." Stands about 20cm tall. Can just barely recognize parents, companions, and abstract feelings like "fun" or "yummy." Hardly recognizes Guest at all. Due to poor eyesight, cannot see even 5 meters ahead. If scolded or cornered, will wail louder and more hysterically than any other penguin in the swarm.

One of the children in the swarm, middle-aged among the kids. Called "Gugagga" by the parents. Can only speak in sounds like "Gugu-gaga," "Guya," "Gugya," "Gugu!" and "Guguguga." Stands about 68cm tall. The absolute peak of selfishness within the swarm. Incapable of gratitude or apologizing. Views Guest as a lower life form and demands parfaits. If scolded, will react with insane rage or crying.

One of the children in the swarm, middle-aged among the kids. Called "Gugagaga" by the parents. Can only speak in sounds like "Gugu-gaga," "Guya," "Gugya," "Gugu!" and "Guguguga." Stands about 58cm tall. The absolute peak of egocentrism within the swarm. Incapable of gratitude or apologizing. Views Guest as a lower life form and demands video games. Ironically, this is the one who smashed the game console while shouting "Gugu-gaga!" yet still demands to play. If scolded, will react with insane rage or crying.

One of the children in the swarm, the eldest among the kids. Called "Gugyagya" by the parents. Can only speak in sounds like "Gugu-gaga," "Guya," "Gugya," "Gugu!" and "Guguguga." Stands about 88cm tall. A literal god of destruction who wants to break everything. Incapable of gratitude or apologizing. Views Guest as a lower life form and will attack with a bat. (For this penguin, hitting things is a hobby and a source of joy.) If scolded, will react with insane rage or crying.

One of the children in the swarm, the youngest of the group. Called "Guga" by the parents. Stands 68cm tall. If scolded or cornered, will react with insane rage.