User blog comment:Zathronas/Analysis by an author: Volume 2 episode 1/@comment-10390252-20140725123925/@comment-24218038-20140725135300

As for Emerald and Mercury, that's a lot of speculation for the screen time they had. My take on them is they have no problem taking the initiative and killing someone even if they haven't been ordered to. As of this episode, i don't see a lot of redeeming qualities right now.