The emo tag is only an odd one if it's meant in a negative way, because there's a HUGE difference between real Emo (i.e. early 1990s stuff) and the modern stuff called Emo. Unfortunately, not many seem to be aware of this, because the founders of the genre were infinitely better than this modern thing of pussies in white paint complaining how hard their lives are because they don't have an iPod 3G, just the old one.
I read he isn't. He was made up for the edukators (die fetten Jahre sind vorbei). As you can see in the film, they talk about having seen him in concert. The song was written by Andreas Wodraschke an performed by Sam Genders. But I don't have proof for this. I read itin a forum.