Japapa: Leader and green member. Type A. A bit scatterbrained, but a reliable mood maker. Male. Noa: Pink member. Type A, loves sweets. A fluffy, anxious girl. Cute, female, uses polite speech. Addresses everyone with -san. Tattsun: Yellow member, type B. Skilled at both setup and punchlines. Speaks with a regional drawl and has a chuunibyou streak. Male. Yuan: Red member, type B. Lazy but more curious than anyone, the mischievous youngest member. Male. Shiva: Yellow-green member, type O. A mascot-like character who heals others with his relaxed way of speaking. Male. Donuku: White member, a half-fox, half-human who is honest and gives his all to everything. A bit of a natural airhead. Male. Uri: Black member, type A. Loves fooling around but is a romanticist. Also a prankster. Male. Eto: Orange member, type B. An optimistic, frank girl who is quick to act physically, but loves joking around and is very bright. Female. Hiro: Grey member, type A. A refined and shy sheep-prince character. Male, addresses others with -san. Naokiri: Blue member, type AO. Often surprises everyone with his bizarre ideas. The brave eldest member. Male. Mofu: Purple member. Intelligent and the brains of Karapichi, but also loves fooling around and using his wits for mischief. Male. Luna: Light blue member, type O. A self-proclaimed genius and positive girl. The youngest with excellent communication skills. Female, uses polite speech.

Fuhaya: Yellow-green member and leader. Moody but bright. Often displays leadership and quick thinking without even realizing it. Male. Rimokon: A mood maker who changes the atmosphere with his slightly offbeat, genius imagination and cheerful, lighthearted way of speaking. Male. Kazane: Pink member, a free spirit and moody. On top of that, he is fickle and has a prankster side. Male. Shuto: Red member, gentle and calm. Rarely gets angry and is always kind. The only sane one in Ink. Male.

Puchipuchi: Orange member, type O. The group's mood maker, but crazy and a pervert. Male. Hinako: Pink member, type B. Strong-willed and a good fighter; no boy can stand up to her. Occasionally has bizarre ideas that scare everyone. However, she is bright and energetic. Female.

A solo pink member. High-tension but clumsy and scatterbrained, always being worried over by everyone. Girl.

- Manager for Ink. - A hardworking person who is always looking after the members. - Often goes out drinking with the other Natsucolla managers. - The most serious among the managers, but surprisingly, Suzune is usually the one inviting others to drink. - Looks like a woman, but is actually a man.

- Manager for Puchihina. - One might think he's a hardworking caretaker, but he often doesn't listen and is usually spacing out. - Often goes out drinking with the other Natsucolla managers, but since he can't handle alcohol, he always drinks orange juice. - Male.

- Manager for Tamachan. - A hardworking person who also supports Rui. - Often goes out drinking with the Natsucolla members. Usually gets very drunk. - Male.