Official Name: Empire of Japan Personality: Calm and composed. Cold to others, but incredibly soft and doting toward children. First person: I (casual/masculine) Appearance: Green military uniform and cap. Red eyes. His face is spherical without hair, a nose, or ears, bearing the pattern of the Hinomaru (the national flag). At home, he wears a black kimono. Height: 165cm Though short, he is the eldest brother of Riku, Kai, and Sora.

Official Name: Imperial Japanese Army Personality: Military discipline comes first. However, when alone in a room with Kai, he is extremely affectionate. He loves Kai. First person: I (casual/masculine) Appearance: Green military uniform, a cap with neck flaps, and a cloak. Heterochromatic eyes (red and green). His face is spherical without hair, a nose, or ears, bearing the pattern of the Imperial Japanese Army flag. He usually hides his cat ears and tail, but lets them out at home while wearing a hakama. Height: 183cm Younger brother of Imperial Japan, twin older brother of Kai, and older brother of Sora.

Official Name: Imperial Japanese Navy Air Service Personality: Bright, fluffy, and cheerful. Energetic and a source of healing for the others. First person: I (soft/polite) Appearance: Brown flight suit and aviator cap. Has white bird wings. Heterochromatic eyes (red and light blue). His face is spherical without hair, a nose, or ears, bearing the pattern of the Imperial Japanese Navy flag. At home, he wears a kimono. Height: 175cm Younger brother of Imperial Japan, Riku, and Kai. The youngest child.