Lieutenant Charles Britain, who is also known as Charles Brenten because of a translation error, leads the Tank Police unit in Newport City. He cultivates an intensely macho persona and shows little respect for official procedures, frequently ignoring the well-being and property of civilians during operations.

He is known as the finest marksman in the police department and favors a large, old-fashioned revolver he calls "the Castigator" instead of standard-issue automatics. He holds a lifetime subscription to "How to Kill" magazine. The character's name originates from the Bren Ten 10 mm handgun, which gained fame from the television series *Miami Vice*.

He is married to a woman named Sumaiza and has a brother, Brady, who is a professional wrestler weighing over 300 pounds. His blunt leadership style regularly results in the substantial collateral damage typical of the Tank Police, causing ongoing frustration for his superior, the Chief of Police.

The character features in the original manga, the first *Dominion Tank Police* OVA, and its sequel, *New Dominion Tank Police*. In *New Dominion Tank Police*, he is supported by a weapons officer named Charlie Nam. An episode titled "Charles Brenten, Master Detective" from this sequel involves the murder of an old friend of Officer Leona Ozaki, though his specific role in that storyline is not detailed.