Though they are biologically the same person, Power Girl behaves as an older, more mature, and more level-headed version of Supergirl, with a more aggressive fighting style. She also adopts a different secret identity from her counterpart. These changes are reflected in their differing costumes and superhero names as well; Power Girl sports a bob of blond hair; wears a distinctive white, red, and blue costume with a cleavage-displaying cutout. The name Power Girl reflects that she chooses not to be seen as a derivative of Superman, but rather her own hero and this choice is reflected in the strong independent attitude of the character. Over various decades, Power Girl has been depicted as a member of superhero teams such as the Justice Society of America, Infinity, Inc., Justice League Europe, and the Birds of Prey.