Just.
I have absolutely no idea who the Niflheim those characters are, and I really wanna know. T_T
As it turns out, I found out who they are.
As far as I can tell, it's a mix of characters from
Future Diary,
Tales of Xillia,
Love, Chunibyo, and Other Delusions,
Guilty Crown,
ef - a fairy tale of the two.,
Angel Beats! and maybe
High School D×D.
Yes, I took screenshots of characters and used Google Images to search.
I must be insane.
And yes, I'm listening to this song once again, in addition to another one:
I like the outfits.
Of course. T_T