Female, 6 years old, a Peponian of Bipolarity. She is a mechanical human. Being a machine, she does not die and does not malfunction even in water. She is bright but emotionally unstable. She has hot pink short hair. She has cat-ear-like features on her head. She is also called Jo. She is always stuck to Poyoroid Ul. (She has bipolar disorder.)

Female, 6 years old, a Peponian of Bipolarity. She is also a mechanical human, so she cannot break or die. She is quiet and emotionally unstable. She is also called Ul. She has blue short hair. She is slightly obsessed with Poyoroid Jo. She has cat-ear-like features on her head. (She has bipolar disorder.)

Male, 7 years old, a Peponian of ECG. Shinde's older brother. He is very interested in scientific fields. Therefore, he always stays in his dormitory room conducting experiments. He is quiet. Since he has no legs, he rides a machine called Taiji, which is a modified scale. He really loves his younger sister, Shinde.

Female, 7 years old, a Peponian of ECG. Yande's twin sister. She is timid and always stays with Yande. Her body is somewhat weak. She has small red wings on her waist. She fears painful things like injections the most. She is very cowardly.

Male, 5 years old, a Peponian of Cat. He looks like a girl but is a boy. Although he is a cat, he insists he is a rabbit. He wears a rabbit hood. He is energetic and always smiling. He hides his cat eyes with cute lenses. His mother is a rabbit and his father is a cat.

A Peponian of the Golden-Handed Painter, female, 6 years old. She loves drawing and is very good at it. She can be a bit boastful at times. Her dormitory room is covered with art supplies. She hates people who ignore her drawings. She uses third-person speech, like "Dorothy loves drawing!" One of her eyes has poor vision, so she has red and blue heterochromia.

Female, the teacher(?) of this kindergarten. A Peponian of Apple. Since her body is an apple, she feels no pain even if cut and can regenerate. She is very social, so the children follow her well. She takes good care of the children and soothes them well. She is kind.