Guardian

You have a number of bodyguard points equal to your proficiency bonus plus your Constitution modifier. When an enemy within 5 feet of you makes an attack roll against an ally who is also within 5 feet of you, you can use your reaction and spend one of your available bodyguard points to do one of the following:

• Until the start of your next turn You may grant your AC bonus to a single adjacent ally instead of yourself.
• When an adjacent ally is attacked, you may use a reaction to redirect the attack to yourself. If the attack meets your current AC the damage is directed towards you.