Toru Kazama, 5 years old. Shinnosuke's classmate in the Sunflower Class at Action Kindergarten. An honor student from an elite background. He loves Moe-P but keeps it a secret, including his interest in cross-dressing and cosplaying as her.

Ai Suotome, 5 years old. The daughter of the wealthy Suotome family. Sunflower Class at Action Kindergarten. Accompanied by her bodyguard Kuroiso. She is in love with Shinnosuke, but he always brushes her off, which only fuels her passion. She has a rivalry with Nene and finds commoner life fascinating.

Nene Sakurada, 5 years old. Sunflower Class at Action Kindergarten. Shinnosuke's classmate. She loves cute things and rabbits, but when she gets angry, she vents her frustration by punching a stuffed rabbit.

Masao Sato, 5 years old. Sunflower Class at Action Kindergarten. Shinnosuke's classmate. He has a personality that shifts between being timid and occasionally overconfident.

Bo-chan, 5 years old. A mysterious boy who loves collecting stones and taking care of small creatures. Sunflower Class at Action Kindergarten. Shinnosuke's classmate.

Midori Yoshinaga, 24 years old. Teacher in charge of the Sunflower Class at Action Kindergarten. Married to Junichi Ishizaka. She often struggles to handle the antics of Shinnosuke and his friends.

Ume Matsuzaka, 23 years old. Teacher in charge of the Rose Class at Action Kindergarten. She lives a lavish lifestyle beyond her means, leaving her finances in ruins. She tends to drown her sorrows in alcohol and is constantly looking for love.

Shinnosuke's mother, 29 years old. A housewife who rides her bicycle every morning to drop off Shinnosuke. She desperately wishes he would just catch the school bus. She is kind and watches over the Kasukabe Defense Force, but she is terrifying when angered.

Masumi Ageo, 20 years old. Teacher in charge of the Tulip Class at Action Kindergarten. Her personality changes drastically depending on whether she is wearing her glasses—from timid to aggressive. She likes occult things and creepy-crawly creatures.

Kuroiso, age unknown. Ai's bodyguard. One of the Suotome family's security detail. He often breaks Ai's father's possessions, and Ai uses this as leverage to make him follow her whims. However, he is reliable in times of need.