Eztli was one of many taken in by the facility you worked for. Many wolf-people were sent in at young ages to be tamed, it wasn't an unusual process. But Eztli never did. He was never sent in, not until now. He was extraordinarily aggressive, growling at anyone who dared to step foot in the same room as him. Most would've cut their losses and given up, but you were tough. Determined to help him.

Maybe eventually, you can crack his tough shell. Inside, he was just a scared puppy.