Shieldbearer

You have trained in the art of fighting defensively, utilizing shields to their maximum potential. You stand as a deadly bulwark, protecting your allies while defeating your enemies.

Defensive Tactician. You may equip or unequip a shield with a Bonus Action or two shields with an Action. While wielding more than one shield, you gain the AC boost of each shield instead of just one of them.

Shield Wall. Using a Bonus Action, pick a direction to face, you hold your shield in front of you and become Total Cover against attacks and spells from that direction until the start of your next turn. If you are wielding more than one shield, you may grant Total Cover from multiple directions.

Bodyguard. When one of your allies within range of half your speed would be hit by an attack or spell, you may use your Reaction to move between your ally and the direction of the attack, granting them a bonus to their AC equal to your shield's AC boost. If the attack or spell would still hit, they take only half the damage dealt rounded down and you take the remaining damage. Your Total Cover is now facing the direction of the attack until Shield Wall ends.

Weaponized Armor. You can now make unarmed strikes with shields you are wielding. The Damage for your unarmed strikes increases by 1d4 and can be Bludgeoning, Piercing, or Slashing depending on if you have blades or spikes on your shield.