Batman The Killing Joke explores the relationship between Batman and the Joker utilising the inevitable end the two can see in front of them to drive each of them to a point or in this case a moment where they have the power to change that end. Throughout the film you come to understand how each of the two central characters were bent into the people they are now and how in Batman’s case, the reason for why he wants to ‘help’ the Joker.
Within the story of Batman and the Joker, we have Batgirl who found herself caught up in the world Batman lives in. The first half of the film focuses on Batgirl and her reasons for following Batman and continuing to fight crime. At the same time as highlighting Batgirl and laying the foundation for a future role Barbara Gordon will play in the universe, her development and struggles also serve to highlight the weight Batman feels as he takes in a another side kick. Given what happened to Jason Todd, it is understandable why Batman concerns himself so much with the ‘Abyss’ he himself has sunk into.