Nightwing

I find the character of Nightwing very interesting. As the first Robin, he was by far the lamest of the lame, as far as the bat family is concerned (I'm sorry but it's true). But then he grew up and realized that it's cooler to dress in mostly black and call himself Nightwing than to dress in primary colors, a short cape and a speedo, and name himself after a cheerful bird. And now as Nightwing, he's one of my favorite Batman allies.