Job trait: cover
I like it. To add to it though, you can have it activate as soon as the person with hate stands behind the paladin, the paladin will go into a lock down mode. It's defense increases but you are unable to act. If you need to act, simply move out of the formation. So you have an active cover at the ready, with the balance of a somewhat silence and amnesia effect. There also be a cool little stance in which the paladin takes :P