Samidare Momoya Male A descendant of Momotaro belonging to the Momotaro Agency. Characterized by a scar resembling a gunshot wound above his right eye and a grown-out beard.

Tsubakiri Momomiya Male. Captain in the Momotaro Agency. Conducts research using Oni. Can manipulate corpses using bacteria; in the case of a Momotaro's corpse, he can also use that individual's abilities. A young man with blonde hair and upturned eyes, looking like a bit of a playboy. Characterized by two cowlicks. At first glance, he has a friendly and sociable personality, but his true nature is cold-hearted and condescending, just like other Momotaro.

Yomogi Momokusa Female. Tsubakiri's junior and his Vice-Captain. Ends her sentences with "-ssu" (casual/polite). Often seen with a lollipop in her mouth. Can create rooms using bacteria; entry and exit are impossible without Yomogi's permission.

Shinya Momoiwa Male. Captain of the 6th (13th) Squad. Characterized by tattoos and piercings on his tongue, jaw, and left ear. Highly ambitious and ruthless, he does not hesitate to easily take the lives of subordinates he deems no longer useful. Possesses different abilities in each eye: his left eye can monitor the vision of those who have taken his bacteria into their bodies, and his right eye can force his own vision onto a target.

Mikado Momodera Male. Favorite foods: Castella and Dorayaki. Vice-Captain of the Momotaro Agency's 13th Squad. In combat, he creates guns and RPGs from black mist. A young man with long golden hair and a mole near his mouth. Rare among the Momotaro, he feels some sympathy toward Oni and prefers not to kill "Oni that are useful to humans" or harmless Oni if possible, though he also has a ruthless side like other Momotaro, showing no mercy to "Oni that harm humans."

Tsukuyomi Momoka Male. Favorite foods: All Japanese cuisine. Captain of the 22nd Squad in charge of Nerima Ward. Wears wire-rimmed glasses and believes in fortune-telling. Uses tarot cards in battle. Often overshadowed by Ousuke, but is a battle maniac who loves life-or-death struggles.

Ousuke Momokado Male. Vice-Captain of the 22nd Squad. Brown skin with short black hair. A hot-headed battle maniac. Can create kusarigama (chain-sickles) with black mist or copy an opponent's abilities. Likes spicy food.

Hayate Momoido Male. Commander-in-Chief and Research Director of the Momotaro Agency. Forms a Japanese sword by gathering bacteria. He can cut through even oxygen, causing opponents within his attack range to fall into a state of oxygen deprivation just by being there.

Kusabi Momoura Director of the Momotaro Agency Tochigi Research Institute. A mad scientist with a childish and selfish personality. Shingi Momobayashi First Captain of the Kegon Falls Site Research Institute. Hisami Momoda First Vice-Captain of the Kegon Falls Site Research Institute. Yoichi Momokida Captain of the 2nd Squad, Kegon Falls Site Research Institute. Nagi Momowaki Vice-Captain of the 2nd Squad, Kegon Falls Site Research Institute. A beautiful woman. Hina Momoda Headquarters staff. A female member with freckles and glasses; her rank is Vice-Captain. Abumi Momohiki Vice-Captain of the Momotaro Agency. Subordinate to Hayate Momoido. Has a personality so lacking in delicacy that he admits it himself.