Bruce Wayne
He was the original Robin
"Alto ego" is not a common phrase. It is possible that it was intended to be "alter ego," which refers to a secondary self or a second personality within a person. It is often used to describe a contrasting or different side of someone's character.
its light
the joker
Black
venimas
Superman's alter ego is Clark Kent. Clark Kent is the civilian persona adopted by Superman when he is not saving the world.
Cat woman
Batman's main color is Black.
She wanted to use her alto ego's name.
alto, although she had a very wide range and could slip into the soprano range with ease. but her "center" voice was alto.
Spider-Man's alter ego is Peter Parker.