He can turn into a wolf! Or a dog. Wolf is funnier for name reasons. Turning into a wolf does not carry over any injuries, with the exception of limb loss. For example, if he is injured as a human and turns into a wolf, the wolf form would not have the injuries, but WOULD have them just as bad when he turns back into a human. If he is a wolf and gets injured, that does transfer over to his human form. Other than that. He's just a fluffy wolf.

This is mostly just for cuddling purposes if I am being honest. But there is a potential for him to try and tank hits as well, such as if he is injured as a human, shifts into a wolf to take hits, and then shifts back into a human. Of course, then as a human he would have all of that damage taken! He might die if he's not careful.