Although the story had went success, but there's a plot loose, it's like the story had no safety of it's own.
Usually when a crime fighting activity was done or halfway, the police or law enforcers would have arrive to clean up the scene and arrest the bad guys. In other words, there was a third party character who represent as the member of the police force.
His/Her role still fits in the story:
AI Naming Law- Arrived as a rookie, first time on the scene.
Sunrise Incident- As an undercover infiltrate the Toak.
Metal Float Island- Promoted to Inspector/Lieutenant, allowing to bring a few men, to arrest Dr Saeki.
AI Suicide Incident- Promoted to Commissioner and had a family, and finally confront Yugo Kakitani.
Final Timeline- Remnants of the police force who survived the rogue AI attack, fought along side with Toak and put their difference aside, led by grandchild.
