Firefly is Garfield Lynns. He is a supervillain.He is a pyromaniac who uses his flamethrower to burn buildings and people.He is an enemy of Batman.Firefly is normally work for hire. He never does anything unless he is almost positive that he is going to make a good payday off of it. He is possibly small change compared to some of Batman's enemies, but can be a big pain. He later becomes the radioactive supervillian named Phosphorus after a highly unstable isotope explodes next to him.