I am a keeper when I have a sibling,
I am a friend to a decision maker,
I am annoying at work,
I am scary in the forest.
Who am I?
Me and my sibling are 75% same
I like boxes
I am popular on Wall Street
I can be found in a travel document
In Russian, they call me 'little bird'
I can be found in all kinds of phallic objects
I am a comics superhero