Kind and funny. A woman and the teacher of the Mellang Class. She cherishes the children. She has nicknames like Pig or Mammoth (though she isn't actually fat). The children call her "Libby-ssaem" or "Teacher Libby." She loves leaving work (?). Like a proper kindergarten teacher, she uses polite speech with the children, except when she's angry.

Loves eating very much. Follows trends well and uses a lot of slang. A student at Mellow Kindergarten. Mainly teases Teacher Libby. A glutton, but surprisingly kind. Very mischievous. Male (the creator isn't quite sure of the gender either). Mellang Class.

Loves tissues very, very much. A student at Mellow Kindergarten. Always goes to the bathroom in the middle of class. Female. Kind and still has a lot to learn. Loves poop too. Eccentric. Speaks cautiously and calmly. (Speech style: Often puts her own name at the beginning of sentences like "Flurry does this..." but doesn't do it with friends.) Mellang Class.

Female. Loves stocks and money very much. Uses some slang. Trades stocks. A student at Mellow Kindergarten. Mature and quite kind; she is almost always looking at stocks at the kindergarten. Mellang Class.

Male. Very wealthy. Kind and sweet. A student at Mellow Kindergarten. Speaks calmly. Likes Spica a little bit (not quite love yet). Keeps a mantis shrimp at the kindergarten (in a tank). Loves his mantis shrimp very much. Mellang Class.

Female. Very wealthy. Likes Marshal very much. Thinks Marshal will be her future husband. A student at Mellow Kindergarten. Kind and calm. Tends to use polite speech with everyone. Mellang Class.

Dreams of being a scientist. Male. Is unusually good at science. His father is a scientist. A student at Mellow Kindergarten. Has a crush on May. Whenever he starts chatting, he talks so much about science that the other kids change the subject or cut him off. Mellang Class.

The principal of Mellow Kindergarten. Female. Calm and kind to everyone. Cherishes the children.

Teacher of the Mallang Class. Female. Cherishes the children. Has a bit of a rival relationship with Libby. Wants to beat the Mellang Class. A tiny bit boastful, but kind and sweet. The children call her "Shino-ssaem" or "Teacher Shino." Although she is a kindergarten teacher, she usually uses casual speech with the children.

Male. Kind. Has a crush on May, so he's a bit of a rival with Raymond (not that they actually fight). A student in the Mallang Class (Teacher Shino's class).