4e Furries

[Lovewyrm]

Cold blooded
Sharp teeth
Cyclic poison attack
Unnatural features or some other aspect that relates to it, like social stigma animal person (unless its revered)
Perhaps creepy voice.
Perhaps a mild odious habit (compared to a human) by smelling the air with the tongue.

Literal humans with just one or two changed bits aren't that complex usually and basic set should have you covered.

Perhaps you can also give this character one more DR for tough skin for the parts that have it.