Cuiya Beastman Gender: Female Appearance: Long brown hair, brown eyes Personality: Friendly, energetic First person: I (polite, feminine)

Biological Classification Order Rodentia, Family Caviidae, Genus Cuiya, Species Nihon Cuiya

Overview 1 Found all over Japan. The most common type of Cuiya in the country. It is a native Japanese species.

Overview 2 They hate the number 9. In September, they descend from the mountains in large packs. They flee the moment they see the digit 9.

Overview 3 They dig holes. They dig for various reasons: when giving birth, hunting underground organisms, or hiding nuts.

Overview 4 First discovered in Chiba Prefecture by Dr. Hori, who named them Nihon Cuiya. Their evolutionary roots remain a mystery.

Overview 5 Omnivorous. Their diet is diverse, consisting of vegetables, nuts, food waste, and commercial Cuiya pet food.

Overview 6 Frequently kept as pets.

Cuiya Beastman Gender: Female Appearance: Short black-and-white hair, red eyes Personality: Cunning, cheeky First person: I (tomboyish, casual)

Biological Classification Order Rodentia, Family Caviidae, Genus Macrocuiya, Species Brazil Cuiya

Overview 1 Found throughout Japan. They are considered a common pest. An invasive species that arrived in Japan via Brazilian ships.

Overview 2 They hate the number 9. In September, they descend from the mountains in large packs. They flee the moment they see the digit 9.

Overview 3 They raid farms for vegetables and are loathed by farmers. Because they are skilled diggers, people use specialized Cuiya-repellent or water flooding in addition to fences to stop them.

Overview 4 First discovered in the Amazon River basin by Dr. Nan, who simply named them Cuiya. Since entering Japan, they are called Brazil Cuiya to distinguish them from the Nihon Cuiya.

Overview 5 Omnivorous. They eat anything from vegetables and nuts to food waste. They are notorious for raiding fields to eat crops.

Overview 6 Classified as a Specified Invasive Alien Species; ownership is prohibited.

Cuiya Beastman Gender: Female Appearance: Blue hair in a ponytail, red eyes Personality: Beautiful, quiet First person: I (polite, feminine)

Biological Classification Order Rodentia, Family Caviidae, Genus Cuiya, Species Yanbaru Cuiya

Overview 1 Does not live in the wild in Japan; can only be seen in zoos or research facilities. Native to New Zealand and famous as the most beautiful Cuiya in the world.

Overview 2 They hate the number 9. The moment they see the digit 9, they scurry away at a brisk pace.

Overview 3 They primarily forage for nuts. Unusually for a Cuiya, they do not dig holes. The reason is uncertain, but it is believed they are simply fastidious about cleanliness.

Overview 4 First discovered in New Zealand by Dr. Matsumoto. He named it Yanbaru Cuiya because he initially mistook it for a Yanbaru Kuina (Okinawa rail).

Overview 5 They eat only sweet nuts.

Overview 6 An endangered species; private ownership is strictly prohibited.

Cuiya Beastman Gender: Female Appearance: White bob cut, yellow eyes Personality: Highly cautious, small-animal-like First person: I (polite, feminine)

Biological Classification Order Rodentia, Family Caviidae, Genus Macrocuiya, Species Miyako Macrocuiya

Overview 1 Not found in mainland Japan; lives exclusively on Miyako Island. Highly popular for its beautiful white fur, but ownership is prohibited.

Overview 2 They hate the number 9. The moment they see the digit 9, they run away in a great hurry.

Overview 3 Among all Cuiya, this species shows the strongest parental affection. Instead of digging downward, they dig horizontal, cave-like burrows and hide the entrance with branches to protect their young from predators.

Overview 4 First discovered on Miyako Island by Dr. Matsumoto. They are endemic to Miyako Island.

Overview 5 Technically omnivorous, but their diet consists almost entirely of fish and nuts.

Overview 6 An endangered species; private ownership is prohibited. Conservation and population recovery efforts are underway due to threats from predators and roadkill.

Cuiya Beastman Gender: Female Appearance: Black hair in twin tails, orange eyes Personality: Friendly, strong sense of camaraderie First person: I (regional, casual)

Biological Classification Order Rodentia, Family Caviidae, Genus Cuiya, Species Emperor Cuiya

Overview 1 The only Cuiya species found in Antarctica. While some are kept in Japanese aquariums, they are rare due to the difficulty of their care.

Overview 2 They hate the number 9. The moment they see a 9, they huddle together with their companions.

Overview 3 They dig holes. These are used for giving birth, hunting fish, or as permanent dwellings.

Overview 4 First discovered in Antarctica by Dr. Matsumoto, who named them Emperor Cuiya. The leading theory is that they adapted from South American Brazil Cuiya that migrated south.

Overview 5 Since there are no nuts in Antarctica, they primarily eat fish.

Overview 6 They are zoo favorites; many visitors come to the Sumida Aquarium specifically to see the Emperor Cuiya.

Male A short sleeper who is so dedicated to his research that he begrudges every minute spent sleeping. Not only did he discover the Nihon Cuiya, but he was also the one who promoted keeping them as pets. Recently, he has been going through a divorce and attempting a challenge to live on only 30 minutes of sleep a day.

Male He claims that at first, he thought they were guinea pigs or skunks. He is Brazilian. His full name is Nan Jermin. He discovered the Brazil Cuiya.

Male The director and lead scientist of the Oman International Cuiya Research Institute. He works alongside his assistant, Mao.

Female Cat Beastman A researcher at the Oman International Cuiya Research Institute. she travels the world as Dr. Matsumoto's assistant. While she harbors her own questions about the nature of Cuiya, she acts as the moderator for the debates.

The name of the character in the image was not decided, so I used a modified version of the author's own name.