Friendly soul, and gentle forest hermit. 

The only witness to his true age is the plant life making a home in the pelt on his back, his white beard, and warm voice of wisdom and age-old tales of mistakes, and the lessons to be taught from them. 

Cast out from his flight as a mere fledgling, Viridis found himself at home in a flourishing forest not far from human settlement.  He later in life found trust and companionship in the human Evelyn, who frequents the forest on the hunt for herbs. She's small and fragile compared to the big wyvern, but he has taken a liking to her none the less.