2-D standing for 2-D but his actual name is Stuart Pot. When Murdoc was dealing with him the first time he he got a dent in his eye making his eye turn completely black. Then Murdoc dealing with him he had got dented in the other eye making both eyes black. Before this happened he had blue eyes. When he was 11 he feel out of a tree so badly that his hair fell out and came back in a dark blue colour.
2D from the Gorrilaz - Album art. I believe it was Jamie Hewlett who did most of the art. It's fascinating because they are a virtual band. So, the design of the fictional characters was all that the fans were going see. Therefore, it had to be good.