Axe armor: Instead of wearing armor on body parts, you wear axes that add to your abilities. Their material and damage type also can exploit vulns.

For example,

Feet: You taped axes to your feet, kick, trample, and cheapshot now prog deathblow.
Head: You glued an axe to your head. Headbutt now also overheads. Blackjacks get chopped in half.
Face: You tape an axe to your face, savage feeding now also slices.
Wrists: You tape axes to your wrists, now when you get kotegaeshi'd the assassins gets hit with artery.
Legs: Trip now hamstrings.
Arms: Kansetsuwaza now slices the assassin.
Body: Whenever someone bashes you or bearcharges you, they get sliced.
Hands: Taped axes to the back of your hands. Get an extra attack for each one that lands.
Fingers: Changes punch damage to the damage type of the axe(but still do punch damage), and you now can parry with them. Making you safe from disarm.
Waist: Chance for added damage on bash.
Neck: Strangle immunity, damages the assassin.
About: Flee now chops.

Also, if you have an axe of a high enough level on all body parts, you get a ward of blades like effect.

More ideas...
Axoflage: It's clear that you're in the room, but all that can be seen is axes, so you can't be targeted.
(Bunch of axes) Someone is here.

Orc Class idea, Axe shapeshifters:
The entire point of this class would be to support Berserkers. You get shapeshift, your only form being axe from level 1 until hero. They will wield you, as you level your form gets different damage types, materials, and your average damage goes up. You can unshift and bash, but that's it. At level 35 you can enslave a second axe, speaking to them with your axe kinship ability. This way while the orc wielding you and your enslaved axe is bashing, you can command it and yourself to pincer. You can also learn to take the form of other well known axes, so that people will pick you up, and you can shift back and bash them, the surprise stunning them for 12 seconds.