Haklo does dress in dark and edgy clothing, but so does just about everyone who is involved with Lues Mage Blood. If anything, the only hints anyone could really gleam that Haklo could be a manipulator aside from appearance is if they know who the Desol Family is and how they're like. And let's be honest, and no offense Witch, but Haklo's record so far for "Using or Manipulating" other characters have been next to none. Xyden has done more and he's not exactly charismatic. Is Haklo tall, dark, and has a roguish charm that may elude to his silver tongue? Sure, but I wouldn't say I'd kill him for it. Unless Haklo has been establishing himself as a manipulator, but that depends on Witch choose how Haklo has been acting since the opening.

What I'm trying to say is, why don't Grey and Haklo have a chat? Maybe see if anything connects between the two men.