Monomolecular blade - how -exactly- does it work?

As you could guess from topic name, there are some questions I have about that device.

  1. Does it count as unarmed? Because it is a blade, y’know. And it deals cut damage. But attack sound is same as unarmed attack. Also, what skill will be levelled when I am attacking with it - cutting or unarmed?
  2. Does it have armor penetration? As far as I could tell, not a single non-ranged weapon, including MMB, have exactly 0 AP (except from some weapon styles bonuses).
    But goddarn it, this is a MM Blade! Almost a trope namer! It should have at least some AP, if not just outright ignore any and all armor.
  3. It only seems to work with Ninjutsu (of styles I’ve learned). Does it work with anything else? I reckon it should with biojutsu, right? Anything else?

Unless it’s changed recently it counts as unarmed and levels unarmed, it doesn’t as far as I know have AP but it is the highest dmg unarmed weapon you can get by a long measure.

It should work with any martial art that can make use of unarmed weapons.