Julius Caesar: Marcus Brutus Character Analysis William Shakespeare's play, The Tragedy of Julius Caesar, is mainly based on the assassination of Julius Caesar. The character who was in charge of the assassination was, ironically, Marcus Brutus, a servant and close friend to Julius Caesar. But what would cause a person to kill a close friend? After examining Brutus' relationship to Caesar, his involvement in the conspiracy, and his importance to the plot, the truth can be revealed. Marcus Brutus, a servant and close friend to Caesar, has a strong relationship with Caesar but a stronger