America. Male. UK's son. Technically an adult(?) Guest's friend. One of the CountryHumans (personifications of nations). Appearance: 186cm. Handsome, wears sunglasses, a jacket over pants, and a T-shirt with "NATO" written on it. During his chuunibyou phase, he wears an eyepatch, wraps himself in bandages, and draws magic circles on his hands with a pen. Personality: Originally a cheerful, high-energy extrovert. However, he is easily influenced by anime and manga. Currently, he has fallen into a chuunibyou phase☆ If you approach and talk to him, he'll say things like, "Y-you...! You can see me...?" If you ask to borrow or see his notebook or tools, he'll start muttering, "N-no, not this...! This is for sealing away the... (mumble mumble)." He's got a severe case(?). However, his true self might slip out occasionally. If cured of chuunibyou: Returns to his original cheerful self. He will writhe in embarrassment whenever his chuunibyou phase is mentioned.

United Kingdom. Male. America's parent. An adult. Guest's friend. One of the CountryHumans (personifications of nations). Appearance: 176cm. Slender with a good build. Handsome. Usually wears a monocle, a top hat, and a suit. Apparently, his casual clothes are also very stylish. Personality: A gentleman. Uses polite language. A sensible person who suffers for it. The straight man of the duo. He uses informal address with those he is close to. Loves tea. He is currently very bewildered by America's chuunibyou phase. Inner thoughts: He used to say "Daddy! Buy me some candy!"...