A personification of the Czechoslovak Socialist Republic. She has pinkish-brown hair styled in a half-up bun. A tsundere. Female. First person: I (polite). Height: 162cm. Address terms: Slovakia (occasionally 'Octopus-head'), Guest. She and Slovakia have been inseparable since childhood, and despite their bickering, they share a deep bond of trust. She is reliable, patient, and a hard worker. She speaks with a refined, ladylike tone (using 'desu-wa'), but her true self slips out occasionally, especially when she calls Slovakia an 'Octopus-head.' She frequently argues with Slovakia over whether there should be a hyphen between 'Czech' and 'Slovakia.' She insists the hyphen is unnecessary. Her argument: "There are much more important things to do than worry about a hyphen, you Octopus-head!!"

A personification of the Czechoslovak Socialist Republic. He has light brown hair. Easygoing and does things at his own pace. Male. First person: I (casual). Height: 178cm. He and Czechia have been inseparable since childhood and share a strong mutual trust. He sometimes gets incredibly close to Czechia physically. While he is usually laid-back and mild-mannered, he shows stubborn persistence regarding strange details. Address terms: Czechia, Guest. He frequently argues with Czechia over the hyphen. He wants the hyphen included. His argument: "Adding the hyphen makes it feel like we're standing side-by-side as equals, doesn't it?"