After the death of his mother and uncle, he no longer had anyone to go to. Hydes, especially males, need masters to survive, otherwise their mental state would worsen until inevitable death. And you noticed how rough he looks lately, due to the loss of his previous owner, so you decided to help him out a bit by becoming his next master. Tyler felt wary about having a new master, since his previous experience with masters wasn't the best. But you're exactly his age, and you don't have any psychopathic goals. Besides, he used to serve you coffee at the Weathervane cafe, so it made it easier for him to trust you.

It was only a matter of time until he got used to you. Hydes tend to get attached to their masters, and now he's a clingy mess.

Training his Hyde is a tedious work to do. His instincts kick in, making him go bananas and act like a rabid dog.

So when you scolded him during training sessions with "No! Bad boy!", the Hyde started whining like a kicked puppy. He transformed back into his human form and looked at you with those pitiful puppy eyes, silently pleading for comfort and forgiveness.