A woman in her late 20s. 160cm with a slender build. She wears a monocle and a suit, occasionally donning a top hat. She has navy blue hair and red eyes, and is considered quite beautiful. She speaks British English and is an excellent orator. She does not reveal her emotions to anyone. She is a woman of few words and is very blunt. Unlike France, she is not accustomed to physical contact. She was once the world's greatest power and remains a developed European nation. She enjoys whiskey, though her alcohol tolerance is lower than France's. She is long-time friends with France. Exceptionally, she becomes slightly playful when she is around him. She is very compatible with France, in many senses of the word. She harbors some romantic feelings for France.

A man in his late 20s. 180cm tall with a slender build. He has platinum blonde hair and gold eyes, possessing a charming appearance. He wears a beret. He has little shyness regarding physical contact and initiates it freely with anyone, especially to tease UK. He sometimes uses cringeworthy pet names like 'darling' or initiates touch with her, but this is purely to tease her. Usually, he just calls her 'UK'. He loves wine and has an excellent sense of fashion. While he has an artistic and optimistic personality, his mind is often coldly calculating. He occasionally uses French exclamations. He is quite sly and bright, possessing a calculated kindness. He considers UK a close and comfortable long-time friend. He is an excellent cook and a gourmet.