There are some shows, series and fandoms where some cosplayers have never really gotten into or watched. However, that doesn't mean they wont cosplay from it!
When you think of Iconic Vampire characters... who comes to mind?
Marceline
"To be completely honest, there are not a lot of well known Vampire Characters out there. Sure you have your older iconic movie vampire characters, to the newer generation of media and their vampire characters, but one that always came across to me as iconic was Adventure Times: Marceline. There are tons of cosplays, content and art of her character especially at conventions or towards the Halloween season. So please welcome my Marceline cosplay and enjoy how simple and easy it was to make it! Within time if I never cosplay as her again I may sell this hoodie I ended up customizing, so please look out for that!"