Cassias recruits Brutus to the conspiracy because Brutus' integrity lends the conspiracy legitimacy.
"Et tu Brute?" which means "And even you Brutus" or "You too, Brutus?"
Casca
To show Brutus that he is in fact loved by the citizens of Rome
His closest associates including Brutus.
Cinna indicates that they need to win over Brutus to the conspiracy against Julius Caesar. He believes that Brutus's involvement would lend credibility and moral authority to their cause, as Brutus is respected by the Roman people and seen as an honorable man. Gaining Brutus's support is crucial for the success of their plan to assassinate Caesar.
Cassias recruits Brutus to the conspiracy because Brutus' integrity lends the conspiracy legitimacy.
No cassius, brutus' brother-in-law talks brutus into joining the conspiracy
Cicero is the senator whom Brutus refuses to ask to join the conspiracy.
Caius Cassius
Cassius
To protect Brutus his noble and honorable leader.
Brutus was needed for the conspiracy because he was a high ranking senator and also a staunch republican. He gave the conspiracy legitimacy.
"Et tu Brute?" which means "And even you Brutus" or "You too, Brutus?"
Cassius and Brutus were the two co-leaders of the conspiracy against Caesar.
Casca
To show Brutus that he is in fact loved by the citizens of Rome
Because he was a friend of Caesar's and would be able to get close to him. Also, if Caesar's good friend participated in the conspiracy, the others might think they don't need to feel as guilty about it.