He is just like Naru a really energetic kid and the first time he met Seishuu he gave him a butt jab. He appears to have a crush on Naru since in episode 3 he was jealous when Naru paid more attention to Seishuu than him. Kentarou is quite interested in bugs and insects.
He has short, buzzcut grey hair, black dots for eyes, and a strange scar at the bottom of his right eye. He commonly wears a blue and white striped tank top and light brown shorts.
Kentarou appears in the last few minutes of the first episode where he gives Seishuu a butt jab when the village volunteered to help him move into is new house. He is seen again in episode 3 where he people await mochi-picking from the boat, yet after being ignored by Naro he picked a batch of mochi, but trips and drops the mochi into the sea. Iwao Yamamura gets angry and punches Kentarou on the head.