Cassius is a character in the play The Tragedy of Julius Caesar that is very critical about Julius Caesar and his ruling. Cassius believes that Julius Caesar should not be ruling and is not an honarable person. Cassius is a very manipulative person who convinces Marcus Brutas that Julius Caesar should not rule. He is a observant and intelligent man who knows what he is doing. In Act 1 there was a thunderstorm which Cassius believed was meant as a sign that Julius should not be ruling!