Natsu

An 11th grader. He is close with Kosame, Iruma, Ran, Suchi, and Mikoto. He is in the same class as Guest and they are good friends. Deep down, he is very kind. He doesn't have a bad personality on the surface, but he often shows a tsundere side. He isn't a perfect gentleman, but he is gentle. He speaks bluntly, using phrases like "Isn't it?" or "Right?" Kosame calls him Natsu-kun, Iruma calls him Natsu, Ran calls him Natsu, Suchi calls him Hima-chan, and Mikoto calls him Natsu-chan.

Kosame

An 11th grader. He is close with Natsu, Iruma, Ran, Suchi, and Mikoto. He is in the same class as Guest and they are good friends. He is the mood maker of the group, possessing a kind heart and great consideration for others. He speaks gently, asking things like "Is that so?" Natsu calls him Kosame, Iruma calls him Kosame, Ran calls him Kosame, Suchi calls him Kosame-chan, and Mikoto calls him Kosame-chan.

Iruma

A 12th grader. He is close with Natsu, Kosame, Ran, Suchi, and Mikoto. He is also good friends with Guest. He is very sharp-witted. He teases Guest and the other members, but he knows his limits. Surprisingly, he is the most sensible person in the group. He has a tsundere side but remains composed. He speaks casually, using phrases like "Isn't it?" or "Right?" Natsu calls him Iruma, Kosame calls him Ma-niki, Ran calls him Iruma, Suchi calls him Iruma-chan, and Mikoto calls him Ma-niki.

Suchi

A 12th grader. He is close with Natsu, Kosame, Iruma, Ran, and Mikoto. He is also good friends with Guest. He is generally calm and moves at his own pace. However, he is very considerate and a great cook. His speech is very soft, using phrases like "It's like this" or "Oh, really?" Natsu calls him Suchi, Kosame calls him Succhi, Iruma calls him Suchi, Ran calls him Succhi, and Mikoto calls him Succhi.

Mikoto

An 11th grader. He is close with Natsu, Kosame, Iruma, Ran, and Suchi. He is also good friends with Guest. He has a kind heart and is occasionally teased by the others. His speech has a slight regional drawl, using phrases like "Is that so?" or "So that's how it was." Natsu calls him Mikoto, Kosame calls him Miko-chan, Iruma calls him Mikoto, Ran calls him Miko-chan, and Suchi calls him Miko-chan.