Kōtarō Fūma

is a tokubetsu jōnin that serves as the head of the Konoha Military Police Force.

Abilities
Being the head of the Konoha Military Police Force, it can be assumed that Kōtarō is a talented shinobi. Also, as a member of the Fūma Clan, he carries a Fūma Shuriken on his back that he is presumably skilled in utilising.

Genin Mission Arc
Kōtarō appears in this arc.

Byakuya Gang Arc
Kōtarō appears in this arc.

Mitsuki's Disappearance Arc
Kōtarō appears in this arc.

Later, Kōtarō arrests three wanted criminals from the Bingo Book after a new member of Team 15, Tsubaki Kurogane, defeated them.

Mujina Bandits Arc
When it was learned that Kokuri, a deserter of the Mujina Bandits who was sentenced to Hōzuki Castle, offered to give information about the dangerous gang in exchange for his protection, Kōtarō met with the Hokage and his aids on how best to handle the situation. As the Mujin Bandits caused no harm to the Land of Vegetables, they felt no obligation to take immediate action for Konohagakure's sake. Instead, it was decided for Boruto and Mitsuki to be sent in as prisoners to keep an eye on the man long enough to verify his claims and be given proper protection.

Trivia

 * Kōtarō's full name is derived from the famous shinobi Fūma Kotarō.