Board Thread:General Discussion/@comment-69.136.247.156-20151027043341/@comment-10390252-20151207100019

People don't need formal psychiatric diagnoses to be bad. It's possible that Mercury just has that generalised fluffy-edged sort of psychotic personality that enables him to kill without remorse.

Now Emerald has a personal emotional connection with Cinder. Whether or not it's mutual is anyone's guess (I'd say 'no' - I'd go as far as to say that Cinder may not be psychologically capable of feeling genuine affection).

Both Merc and Emmy both seem to be 'street trash' characvters who Cinder or someone else has trained up to Huntsman level to act as soldiers or even lieutenants.