Regarding villain!Mod
Okay
so
I have come up with a backstory for her
but I’m not going to tell you what it is.
My logic behind this is that her behaviour is (would be?) so very like chaotic characters like Discord and Mad Mod, who’s personal details you only get told about in fragments, or not at all. If she were to appear in the cartoon (and I were writing the episode) it would be precisely like that. Crazy fun times and explosions, a lorry load of puns, some considerable amount of ripping reality to pieces and breaking the forth wall and that’s that.
In writing you always have to think about balance. You have to have comedy, you have to have tragedy. You have to have fast paced action, and you need time to contemplate. You have to have information, and then you have to have the freedom to imagine. There would be exposition episodes and characters who would get a full backstory and sad stories to contrast the comedy, but then there would have to be room for speculation with others.
Perhaps eventually she would get one of those oh-god-my-heartstrings-why episodes in the second or third series (Adventure Time didn’t exactly start off with us knowing the Ice King’s origin from day one), but I figure this way you lot can have as much fun writing theories and ficlets as you jolly well please, and I can sit comfortably in the knowledge that Mod would and always will be a complete grade-A nutcase.