"I'm 17.  Training took me three years, it's about standard.  For a human."  He gave Ethan a quick glance.  "It's hard for us hybrids to make our way in the humans' world, and it pro'ly would have taken me longer if I wasn't able to pretend to be one."

To demonstrate, Sebastian folded his ears back.  He tucked his tail into his shirt and wrapped it around his torso, then put on his jacket, hiding the fur on his arms.  He looked a little heavier, but definitely more human.  He did have a slightly wolfish face, but if you didn't know he was a hybrid, it wasn't too obvious.