What? [He looked up in mild surprise, not having heard Junpei coming. But he glanced from his would-be adviser to the idle sketches, quickly processing the actual question.]

It's a pair of blades--they connect and disconnect at the hilts from this point. [Ardyn indicated a spot on what must have been the handle with the pen he held.] Used together, they're powerful but awkward. Separated, they're faster and easier to control.