Unfortunately the original owner of Max hasn't responded but I'll try my best to find the artist based on their watermarks.

Anyways, it seems for this one Max was genderbent, but for her backstory's sake we're just going to pretend she's not. ;3

Before she met Finn, Max was the kind of person who loved to scare the shit out of people for fun. She was mean, spiteful, and downright evil. But don't worry. She's a clumsy little sweetheart now. <3