Corleone family
The fall of Batista's regime in Cuba forces Michael to temporarily abandon his plans to become a legitimate businessman, and he resumes his role as the Don of the Corleone family. During the Senate hearings on the Mafia, Hagen is instrumental as the defense when Michael is interrogated. Near the end of the film, Hagen is unable to disguise his displeasure over Michael's increasing ruthlessness and paranoia, questioning the need to kill an already dying Hyman Roth. In response, Michael confronts Hagen about his competing job offers, and obliquely threatens to inform Hagen's wife about his mistress. Challenged point blank to confirm his loyalty to the Corleone Family, Hagen responds to Michael (in Sicilian) that he remains loyal. He dutifully fulfills his role as legal adviser, and also in the "consigliere"s traditional role as dispassionate family envoy. He gives Frank Pentangeli (Michael V. Gazzo), who had betrayed Michael, the "idea" of committing suicide so that Pentangeli's family will be taken care of, while agreeing with Pentangeli that at one point the Corleone Family "was like the Roman Empire".