User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-16281343-20141119232717

SPECULATION:

With the spoiler saying that Tiamat is the judge of the Rating Game behind the scenes, she saved the two of them from getting killed.

It was Sirzechs and Ajuka's plan to ascertain whether their speculation of Belial as a traitor is correct or not.