User blog:Alemon97/Ember VS Marceline: Lacking knowledge of Marceline's backstory

Right now I'm working on my latest episode: Ember VS Marceline. I got all the info on Ember, which was easy for me to summarize. However, I'm having trouble on summarizing Marceline's backstory. Maybe it's because she's from the longer running series and that she seems like a more complex character? In any case, I would appreciate some help here.