Giulio Andreotti
Andreotti is the Prime Minister of Italy who has been voted into his 7th term. The film spans his 7th term, his being beaten for an 8th and to his first trial for conspiracy and murder. Andreotti was a Christian Democracy party member who was plagued with conspiracy and corruption throughout his time as Premier of Italy - all charges which were never able to be upheld in court.
Paolo Cirino Pomicino
Pomicino is one of the inner faction members close to Andreotti in the Christian Democracy party. He is a man who is constantly speaking and turning votes for Andreotti in order to keep him in power. Pomicino is a slick man who is far more capable than his appearance lets on.
Vittorio Sbardella
Sbardella also known as The Shark is part of Andreotti's inner faction of the Christian Democracy party. Vittorio is a notorious businessman who carries a lot of weight with his 330,000 voters. He eventually cuts ties with Andreotti before the Prime Minister is beaten out for an 8th term.
Livia Danese
Livia is Andreotti's wife. She doesn't appear much at the beginning of the film and their relationship appears to be in name only. We learn that she knows the true Giulio when she tells him bluntly that she knows he is not as intelligent and powerful as people believe him to be, but merely fooling everyone - except her, that is.
Franco Evangelisti
Evangelisti is a member of Andreotti's inner faction of the Christian Democracy party. He's a politician and a supporter and follower of Andreotti. He was Andreotti's undersecretary since 1976. Shortly after Andreotti loses his 8th term for Prime Minister he falls ill and eventually dies before any formal investigation is brought against him for being part of Andreotti's faction.
Salvo Lima
Lima is part of Andreotti's inner faction of the Christian Democracy Party. He's a politician who is said to have had connections to the mafia. He is killed towards the end of the film and it is significant as the mafia's political support of Andreotti is beginning to change.