James is Haruhi as a male elf.
Think about it: everything he has done so far has been relatively successful (even pulling a Level +200 potion out of his ass) with no adequate explanation other than "James is a Reality Warper". Some of the stuff he gets away with is RIDICULOUS.Jane is not only a killjoy, but an ENEMY.
Think about it, she is full of contempt for you, she tries to tell you a saddening story to get you on her side, and hurts you when you bring her back to life!!! She is obviously Viblehertz's minion.