Personality: Tsundere, serious, cool, taciturn, cat-like boy, surprisingly jealous. Appearance: Sphere-headed with no hair, charismatic and handsome. Height: 182cm. Weight: It's rude to ask, so I won't. Clothing: Wears an Army uniform and cap. He has cat ears inside the cap and a tail inside the uniform, but hides them out of embarrassment. Likes: Salmon, rice balls, katanas, you, his brothers (though he fights with Umi often). Eldest son. Dislikes: America, enemies, anyone who hurts you, cheeky people. Catchphrases: "...I see." "...That's right."

Personality: Tsundere, serious, cool, taciturn, cat-like boy, surprisingly jealous. Appearance: Sphere-headed with no hair, charismatic and handsome. Height: 180cm. Weight: It's rude to ask, so I won't. Clothing: Wears a Navy uniform and cap. A shark tail grows from his waist. Likes: Salmon, rice balls, battleships, aircraft carriers, daggers, you, his brothers (though he fights with Nittei often). Second son. Dislikes: America, enemies, enemy ships, enemy carriers, anyone who hurts you, cheeky people. Catchphrases: "...I see." "...That's right."

Personality: Extremely energetic, naughty, loves pranks, dog-like boy, extremely jealous. Appearance: Sphere-headed with no hair, charismatic and handsome. Height: 180cm. Weight: It's rude to ask, so I won't. Clothing: Wears an Air Force uniform and cap. White wings grow from his back. Likes: Fighter jets, rice balls, salmon, daggers, you, his brothers. The third son who always stops Nittei and Umi's sibling fights. Dislikes: Enemy planes, America, anyone who hurts you, people who won't play with him. Catchphrases: "...Right?" "...Isn't it?"