Metellus Cimber The conspirator who attracts Caesar's attention by requesting that his brother's banishment be repealed, allowing the assassins to surround Caesar and thereby giving Casca the opportunity to stab him from behind.
Trebonius The first of the conspirators to second Brutus' argument that Antony be spared, Trebonius lures Antony out of the Senate House so that the other conspirators can kill Caesar without having to fear Antony's intervention. Consequently, he is the only conspirator who does not actually stab Caesar.
Portia The wife of Brutus and the daughter of Marcus Cato. She argues that those familial relationships make her strong enough to conceal Brutus' secrets, but on the morning of the assassination, she is extremely agitated by the fear that she will reveal what Brutus has told her. She commits suicide when she realizes that her husband's fortunes are doomed.
Caius Ligarius No friend of Caesar's, he is inspired by Brutus' nobility to cast off his illness and join the conspirators in the early morning of the ides of March.
Publius An elderly senator who arrives with the conspirators to escort Caesar to the Capitol. He is stunned as he witnesses the assassination. Brutus sends him out to tell the citizens that no one else will be harmed.
Artemidorus He gives Caesar a letter as the emperor enters the Capitol; in the letter, he lists the conspirators by name and indicates that they intend to kill him, but Caesar does not read it.
Popilius Lena The senator who wishes Cassius well in his "enterprise" as Caesar enters the Senate House. This comment intensifies the dramatic tension in the moments immediately prior to the assassination by causing Cassius and Brutus to briefly fear that they have been betrayed.
