|Played by||Kazuko Sawada|
Junpei Hayami is the second son of the Hayami Family. He serves as a supporting character for the series along with his brother and father. He bears some similarities to Kichiza Abashiri from Abashiri Ikka.
Junpei is a grade school age boy with messy black hair and eyes. His usual clothing consists of a t-shirt and a pair of shorts.
Junpei is a mischievous boy who likes to poke fun at others especially his older brother Seiji. He has a crush on his classmate Miyo-chan, but is also fond of Honey Kisaragi and gets jealous when he is left out of an adventure. Junpei does not even mind that Honey is actually an android. While Junpei treats Honey like an older sister, he has a rather perverse approach towards her such as touching certain parts of her body or peeping on her in the bath.
Despite Junpei's young stature, he seems to have inherited some of his father's combat capabilities able to fight off at least a single Panther.
Junpei usually appeared with his father during the series but did not get as much screen time as his family did.