Well, it’s official, I now have two characters called a Psychopath. Granted, this one didn’t trademark his own name. Nor are they remotely related aside from abject psychopathy.
Perhaps a fondness of axes. I originally wanted to give him a rifle but something to swing at people made more sense contextually here. And it wouldn’t have been quite as funny for the Martian The Psychopath™ to call a rifle “Ole’ Softy”.