User blog comment:B214/Volume 21 info & spoilers/@comment-104.7.80.211-20160411015806/@comment-27876048-20160411140732

From the Greek faction my money is on Aries, Apollo, Heracules, anyone along those lines and Athena was probably left behind.

From the Norse probably Thor, Tyr, etc.

I don't know enough about the Hindu mythology but probabily Kali was in that group

Pretty much all the mythological heavy hitters were sealed with Trihexa and the wisest/most intelligent were left behind.

That's my theory