Matthew Casey is one of the main characters in Chicago Fire. He is also a natural leader, with a promising future and a need to do what is right. He ruffles feathers throughout the show (ie. when a cop stalked and harassed him bc he refused to retract the statement abt the cop’s son drunk driving and causing a major car accident) but he sticks to his guns and doesn’t change his mind. He also isn't afraid to say what’s on his mind and protect his loved ones.