[Terri87]

Spoiler for plot holes:

I don´t remember seeing an explanation regarding why the blickwinkel possesed Hokuto. I think it was mere chance, though I do remember reading somewhere, I think it was in kgptzac site, that Hokuto was needed in order to "join the dots".
By the way, since most of the game takes place in several alternate universes which are different from the universe in which the "true ending" develops, which do you think is the fate of the main characters after LeMU?