I have no idea why The Goddess of Hel would be spending so much time hangin' out with Jane though.
You'd think she'd be busy, what with running Hel and all.
I find it amusing that they portray the ruler of Hell as some hot buxom half naked chick. I suspect most men would not consider being ruled by a woman like that "Hell", more like a really wild Saturday night.
They may go more in the direction of the myths for this, where she is half dead and/or sort of grotesque.