Who seems to change the most after Caesars death?

After Caesar's death, Brutus undergoes significant change, transitioning from a respected senator and friend of Caesar to a leader of the conspirators grappling with the moral implications of his actions. His idealism is challenged as he faces the consequences of the assassination, leading to internal conflict and a sense of disillusionment. Ultimately, Brutus's commitment to the republic and his tragic realization of the chaos that ensues highlight his profound transformation throughout the events that follow.