Answer:
He cares about those who serve him.
He uses music to help him relax.
Step-by-step explanation:
According to the excerpt from act 4, scene 3, of The Tragedy of Julius Caesar, Brutus begs his servant to play him some music because he knows his servant is tired and is due a rest to which his servant replies that he does not mind as he is merely doing his duty.
This interaction reveals that Brutus cares about those who serve him and uses music to help him relax.