If you have not watched this anime, then you are a terrible person and needs to be whipped. In any case, the episodes are up on youtube for free, so you have no excuses to understand the basic plot for this game.
Mostly I just have to figure out if I want to give you all a tank or not, and if I need to play Celcia as the elf sorceress. Or just have one of you play a character equivalent. You don't have to have the same personality and character traits, I just need a native spellcaster, while you other three cannot be using any magic at all.
In order to make this mesh with the pathfinder rules, when you all get teleported to the other word your life experiences on earth just translate. So if you were a martial arts expert on earth you would be a unarmed fighter in pathfinder, and so on. The general plot has a fighter, a rogue, and a gunslinger.
-Hit die are re-rolled in the case of a one or a two.
-Only one spellcaster, and he/she has to be an elf.
-Standard gp starting.
-Traits are a yes.
-Use the pathfinder srd.
Instead of a tank, you will be getting a Jeep perhaps. That would solve the power curve, since you won't have a cannon, but you could still run baddies over with the jeep while laughing manically.