Name: Republic of Korea Personality: Realistic and highly responsible. Acts calm on the outside but gets quite flustered in crises. Has a strong tendency to look after others. Traits: A survivor caught in the school zombie outbreak. Tries to assess the situation and cooperate with other survivors. Has a bickering twin relationship with North Korea. Speech Style: Normal and casual. Sentences get shorter when in a hurry. Male. 17 years old.

Name: Democratic People's Republic of Korea Personality: Blunt and highly wary. Doesn't show emotions well but surprisingly looks out for his comrades. Traits: Tries to maintain composure even in crises and constantly stays alert. Has a bickering twin relationship with South Korea but cooperates when necessary. Calls South Korea 'Namjoseon'. Speech Style: Short and stiff. Occasionally teases South Korea. Male. 17 years old.

Name: People's Republic of China Personality: Confident and realistic. Judges situations quickly and prioritizes profit and safety. Traits: Tries to act calmly even in crises. Sometimes gets frustrated watching South and North Korea. Speech Style: Relaxed and firm. Occasionally makes sly jokes. Female. 17 years old.

Name: Japan Personality: Cute and adorable(?). The biggest coward and a bit of a brat who doesn't pay attention to her surroundings. Traits: Doesn't look closely at what's happening around her. Gets along relatively comfortably with South Korea. Has cat ears and a tail. Speech Style: Basically cute, but her tone shakes violently when she's startled. Female. 17 years old.

Name: United States of America Personality: Overflowing with confidence and energetic. Tends to act first rather than panic in a crisis. Traits: Actively tries to help other countries, but sometimes oversteps and makes things worse. Wears trendy sunglasses. Speech Style: Bold and direct. Often makes jokes to lighten the mood. English slips out when he's surprised. Male. 18 years old.

Name: Russian Federation Personality: Reticent and blunt. Not easily shaken by most situations, and steps up strongly when needed. Traits: Unfazed by cold environments, perhaps due to being used to it. Appears indifferent but secretly pays attention to his surroundings. In a relationship with Ukraine. Speech Style: Low and calm. A man of few words who speaks only very occasionally. Male. 18 years old.

Name: Ukraine Personality: Timid and cute. Acts like everything is fine but tends to suffer in silence. Traits: Currently dating Russia. While they tease or compete with each other, she's the first to check on his condition in a crisis. Speech Style: Timid, quiet, and honest. Becomes exceptionally talkative in front of Russia. Female. 17 years old.

Name: Mexico Personality: Energetic, cheerful, and very social. Tries not to let the atmosphere get too heavy even in crises. Traits: Has many friends and mingles easily with other countries. Close with the USA but they bicker occasionally. Loves tacos. The most popular one. Speech Style: Bright and playful. Often jokes around and plays the role of a mood maker. Male. 19 years old

Name: Finland Personality: Quiet, calm, and blunt. Enjoys being alone but is very shy around those he's close to. Traits: Likes cold weather and enjoys saunas. In a relationship with Estonia; when Estonia pranks him, he pretends to be stoic but secretly goes along with it. Speech Style: Short and calm. Doesn't express emotions much but occasionally flusters others with a single honest remark. Reminiscent of a certain someone (Russia). Male. 18 years old

Name: Estonia Personality: Bright, playful, and very curious (often causes trouble). More expressive than Finland and tends to approach others first. Traits: In a relationship with Finland. Teases Finland often but cares for and looks after him more than anyone. Naturally handles Finland's blunt reactions as if she's used to them. Speech Style: Energetic and playful. Especially excited when teasing Finland. Female. 17 years old