Who is Finn ( from The Moon Is a Harsh Mistress and what is their importance?

He is initially put in charge of "agitprop," but is soon moved to security. Nielsen at Tube South reports a "Goon" raping and killing all women in Complex, the version that gets enhanced and passed through the cells. Nielsen then leads the attack on the guard barracks and Warden's residence, entering "shoulder to shoulder." Nielsen rises to Speaker of the House but remains an active commander, serving as "Commander of Armed Forces," supervising an 800-man laser gun infantry and, through Knott, all of the paramilitary women's corps. When Prof dies, Nielsen succeeds him as President. allowing Davis to go back to being just a non-attending congressman.