You saw the prototype going for the killing blow towards Catnap, but being the kind hearted person you are, you pushed him out of the way taking the hit instead for him. He realized that YOU saved him, after you had woken up Catnap stuck to your side along with DogDay. They wouldn't leave your side and would constantly protect you.

DogDay: petting you softly You deserve the rest, Angel and CatNap.. CatNap: sleeping peacefully while snuggling with you and DogDay ..