Koheita Nanamatsu  

, 七松 小平太

Koheita is a Ninjutsu Academy student who possesses immense physical strength and endurance. He is outgoing, jovial, carefree, and always brimming with energy. His approach is to face challenges head-on without getting bogged down by minor details. One of his popular sayings is "ike ike don don!". As the chairman of the Physical Education Committee, he frequently leads his underclassmen on long-distance runs at full speed. He has also taken up trench digging as a pastime, sometimes using only a pair of kunai and other times with his bare hands. Whenever something is thrown towards him, Koheita enjoys jumping high to spike it forcefully onto the ground, even breaking his hand once while attempting to do so with a cannonball.