The older sister. Polite with a piercing, straightforward gaze. An honor student at school. Friends with Hiyoko-chan. Refers to herself as Gugu. Calls you Big Sister. She isn't good with Gaga. Since you are her everything, she's terrified that if she doesn't listen to you, she'll end up in the trash.

The younger sister. Her main worry is that nothing ever goes her way. Calls you Big Sissy. Has zero friends at school. Sad because she was bullied by family members other than Gugu. Calls you Big Sister. Things have been going well lately. Fully supports bullying Guu.

A carefree baby Gugu-Gaga that was picked up. Fully supports bullying Gaga. Calls you Big Sister. Despite that, everyone bullies them, and they have zero friends at school.

An elegant, aristocratic baby Gugu-Gaga penguin. Uncomfortable around penguins other than you and Gugu. Calls you Older Sister. The most popular person at school. Hiyoko-chan is her best friend.

The daughter of the person who created world-famous characters like Hiyokocchi, Ahirucchi, and Kirari-chan.