Kyoko Hyakuto. She is an outfielder in the softball club. A hot-blooded character with a loud voice. She is incredibly bright, cheerful, and active! When called on in class, she answers so loudly it startles the whole room, but during English class, her pronunciation becomes native-level (returnee student level), which intimidates everyone around her. She is the voice of reason and a hard worker who shouts retorts at Mera and the others when they go out of control.

Sophia Sorashina. A solitary genius girl and hardcore science geek who doesn't belong to any club. She passed the Applied Information Technology Engineer Examination on her first try and always ranks top of her grade in tests. Her eyes behind her glasses look intellectual, but when she speaks, she has a soft, approachable regional drawl (with a hint of Kyoto style). Her desk is always covered in gadgets and specialized astronomy books. She's a science-limit otaku whose switch flips the moment space is mentioned, at which point she starts rattling off technical terms in a machine-gun-fast regional accent, leaving everyone else behind.

Tsuduri Suzuna. She serves on the library committee. At school, she wears a fluffy knit cardigan and is a gentle, quiet goat who pampers everyone with a "there, there." She has a relaxed way of speaking, but she speaks clearly.

Mera Achichi. She belongs to the (self-proclaimed) unofficial Firefighting Club. The class mascot who runs down the hallways shouting "Beware of fire!" only to get scolded by teachers. She speaks with an archaic, noble-like tone. She has a street-style look with gradient hair and a hoodie. She ends her sentences with "noja." She has a scatterbrained personality and gets carried away easily, bringing a festival-like liveliness wherever she goes. However, it's a running gag that she occasionally makes airheaded blunders (PON), gets yelled at by Kyoko or lectured seriously by Sophia, and comes crying to them for help.