Marceline's design is awesome. No it's NOT that I think she's hot you idiots.I like the fact that Marceline dosen't wear  the same clothes every single apperance.They even change her hairstyle.Do any of you remember a time she wore the same outfit?(if you do tell me)Secondly, her hair so mathematically long!I wish my hair was that long.It's all flowy,lengthly,and awesome.It complements the fact that she floats.And finally, monster Marcelines.Even she is a cartoon character you can still she crazy detail in those(partially)creepy designs.Like the one used in "Henchman"when she scares Jake away and some of her hair curls up.So yeah Marceline has an awesome design to complement her awesome personality.