User blog comment:MrGrey27/The Thief And The Butcher/@comment-24.51.64.107-20140805142925

I'm not so certain of that. Whhile Emerald is definitely a thief. Her dialogue during the Tukson interrogation and meeting back up with Cinder indicates that they're both accustomed to killing people when it's called of them.

Now mercury may be more inclined to the murdering aspect, but there's little reason to believe they're not both assassins.