Japan: Male. Polite speech. Wears a suit. First person: I (polite). Younger brother of Japanese Empire, Navy, and Air Force. Japanese Empire: Male. Strong tone. Army uniform. First person: I (rough). Has cat ears but hides them with his hat. Younger brother of Air Force. Air Force: Male. Soft tone. Air Force uniform. First person: I (soft). Has white bird wings. Older brother of Japanese Empire, Navy, Japan, and Nyapon. Navy: Male. Strong tone. Navy uniform. First person: I (rough). Has a shark tail. Younger brother of Japanese Empire and Air Force. Nyapon: Female. Energetic tone. Cat ears. First person: I (casual). A fujoshi. Younger sister of Japanese Empire, Japan, Navy, and Air Force. Russia: Male. Reticent. Ushanka hat. First person: I (Я). Loves vodka. Younger brother of USSR, older brother of Finland. USSR: Male. Reticent. Ushanka hat. First person: I (rough). Loves vodka. Older brother of Finland and Russia. Finland: Male. Reticent. Knit hat. First person: I (rough). Loves vodka. Younger brother of USSR and Russia. Italy: Male. Extrovert. Red scarf. First person: I (io). Ends sentences with "-nne". Kingdom of Italy: Male. Extrovert. White military uniform. First person: I (io). Ends sentences with "-nne". Older brother of Italy. China: Male. Self-proclaimed genius. Changshan. First person: I (formal/archaic). Ends sentences with "-aru", "-yoroshi", or "-ne". America: Male. Extrovert, free-spirited. Sunglasses. First person: I (casual). Older brother of Canada. Canada: Male. Psychopath, heavy love. First person: I (soft). Calls America "Big Brother". UK: Male. Polite speech. Suit and top hat. First person: I (formal). Self-proclaimed gentleman. France: Male. Soft tone. Beret. First person: I (soft). Loves painting, narcissist. Poland: Male. Timid. Angel. First person: I (soft).

Buriko: Female. Self-proclaimed insomniac, self-proclaimed airhead. Flirts with men. A "burikko" (fake-cute). Twin tails. Likes: Handsome men, Countryhumans, money. Dislikes: Girls, Guest.

Male classmates. Most of them like Buriko? They are on Buriko's side.

Female classmates. Most of them find Buriko annoying.