Hattori Kanzou 服部貫蔵

Kanzo Hattori aka Hattori-kun, is the protagonist of the series, a little ninja. He is the boy who usually contests Kemumaki when he performs pranks. Hattori's main weakness is that he is afraid of frogs; this often leads him into trouble. He wears blue coloured ninja robes. He always explains what a good ninja does and likes meddling in his friends' business. His powers can be compared to a master ninja. He also has a strange habit of saying ~degozaru or nin nin after almost every sentence. His girlfriend seems to be Tsubame.