The middle sibling of the Sawarabi Family, a branch of the Niounomiya Troupe. He is a professional hitman along with his other siblings. Like his older brother, he despises the Zerozaki Clan. While in combat, he wields a Naginata.
Naguma is angry over the loss of his younger sister. He persistently works towards avenging her by pursuing the Zerozaki Clan.
He is Hawatari Sawarabi's younger twin brother. They are known to switch places to defeat their opponent.