This fighting style is unique to only those who's bodies don't follow basic humanoid anatomy.  Those who have been exposed to radiation or endured some traumatic mutilation of their bodies. Having an atypical formation of limbs leave people unable to countering your attacks. Even those properly trained in fighting need to take time to decipher your way of combat. 

Unfamiliar Composition

Starting when you choose this tradition at 3rd level, you can begin to use your strange formation to your advantage. As a bonus action you may spend two ki points to boost your AC by an amount equal to a roll of your martial arts die.

Unique Martial Arts

At 6th level you use your complex fighting style to make yourself harder to hit.  At the end of your turn an enemy who is engaged in combat with you can make an insight check against your ki save.  Every time the creature fails a check the DC goes down by two.  Until that check is succeeded the creature has disadvantage on any attack rolls made against you.  Once a creature succeeds a save they are immune to the effects of this ability unless their memory of the fight is erased or otherwise altered.

Redirect Blows

Beginning at 11th level, your vital points are not as easily accessible as many others'.  When you're hit with a melee attack that you can see while you are not incapacitated, you can spend a ki point on your reaction to reduce the damage by a number equal to a roll of your martial arts die + dexterity modifier + monk level.

Unexpected Versatility

At 17th level, you've learned to manipulate when people underestimate you or if they don't understand how you move. You gain a permanent +2 to AC as well as Dexterity and Strength Saving Throws.