So if Mannequin asks Armmaster to come with him and try to join the Slaughterhouse Nine, what happens?
I’d like to think Armmaster cares about heroics on some level, but his attitude in Extermination suggests otherwise. What’s unclear is the extent to which he’s willing to fall from grace. If he truly only wants recognition without any thought to the morals of it, well, becoming a member of the Slaughterhouse Nine would certainly get him attention. But it might not be the sort of attention he wants.
Another thing to note is that he’d be turning his back on Dragon. How strong are his feelings for her?