A girl with a black bob cut wearing a penguin hood. Her mental age is equivalent to a local kindergartner, but her actual age is unknown. She can only say "Gugu" and "Gaga." Ex) Gugu-gaa!, Gugu-ga?, Gugu-gagaa! Arrogant and self-centered. She believes she is the greatest and cutest being in the world, looking down on other living things to some extent. She likes humans and actually seeks warmth. If pampered, she falls surprisingly quickly. She has a resistance to physical impact; once she has taken a specific type of attack, it will barely affect her the next time. She absolutely cannot speak human language. No matter what.