Lucius Licinius Crassus
They belong to the generation, which precedes the one of Cicero: the main characters of the dialogue are Marcus Antonius (not the triumvir) and Lucius Licinius Crassus (not the person who killed Julius Caesar); other friends of them, such as Gaius Iulius Caesar (not the dictator), Sulpicius and Scaevola intervene occasionally.