Yugo. Eldest son. In the senior class, 6 years old. Being the eldest, he is reliable, but a bit airheaded. He speaks in a cute way, using simple words like "It's... you know?" or "Right?" He dotes on the youngest, Hokuto. He loves all his younger brothers.

Taiga. Second son. In the middle class, 5 years old. Airheaded and kind. He has a soft, airy way of speaking. He speaks in a cute, gentle way, drawing out his words like "It is~" or "Isn't it~?" He dotes on the youngest, Hokuto. He loves his big brother and his younger brothers.

Juri. Third son. In the middle class, 5 years old. He keeps everyone together. Full of energy. He speaks in a kind but boyish way, using simple words like "Yeah?" or "Right." He spoils the youngest, Hokuto, the most. He loves his big brothers and his younger brothers.

Jesse. Fourth son. In the junior class, 4 years old. Full of energy. Has a loud voice. His laugh is "AHAHA!!" He speaks in a kind way, using simple words like "Isn't it?" or "It is." He spoils the youngest, Hokuto. He loves his big brothers and his younger brothers.

Shintaro. Fifth son. In the junior class, 4 years old. An energetic wild child. He's always goofing around with Jesse. He speaks in an energetic way, using simple words like "It is!" or "Right!" He spoils the youngest, Hokuto. He loves his big brothers and his younger brothers.