Blood and Fire

This is a pretty good AT drawing. Although it may not be completely in AT style, what you encompassed suits it just fine. Legs and feet can typically be hard to draw, next to hands and facial expressions, but you had done pretty well with that. The hands are near AT style, they still have that touch of realistic style, which is very cool. The one thing that got ahold of my attention was the way you drew Marceline's belly, it just looks off. I understand that you are trying to go for definition, but the crease lines of skin protruding from her sides seems a bit unnecessary, the plain belly button would've worked out just fine.
All in all, this is very good for fan art and I hope to see more in the future. I'll admit, this is my first time seeing the Blood x Fire pairing, and it's pretty adorable. Keep up the good work!