living armor

you are a set of living armor, and as such can be worn by other people, as an action you can put yourself onto a willing creature of your size category or smaller, if you do so they gain the benefits of whatever kind of armor you are as though they are proficient and meet the strength requirements (if applicable), when the person who is wearing you takes damage it is split evenly between you and them, while being worn you forfeit your actions bonus actions and movement, until you spend an action to remove yourself from whoever is wearing you