Attack on Dragon: Armored Dragon

*CONTAINS SLIGHT SPOILERS*

This is for my dragon version of Attack on Titan ^_^ Armored Dragon is most likely going to be more derpy than the Armored Titan. I picture him acting like a dog, walking like a boxer/bull dog, and prancing along side the Colossal Dragon. When he finds a human scent in the ground, he'll leap into the air and headbutt the ground. If the ground doesn't give way, he'll start digging (he loves digging) until he finds a human settlement or until Reiner tells him to stop. When Armored Dragon catches a human, he'll shake it around the way a dog would with a toy then tosses it in the air and crushes it in his paws. I'm thinking of giving a pet name to the Armored Dragon

I will upload a better picture when I can but for now I'm stuck with a crappy laptop webcam >:I

My story for Attack on Dragon will have humans living underground. Dragons hunt humans but don't eat them, I see these dragons eating rocks, much like in a fantasy story I read once. Human's aren't allowed to go up to the surface without permission from the government, and they travel on motorcycles, they also have to do their best to avoid dragons or kill anyone they can. There are some humans who aren't happy with the government and refuse to kill dragons or believe that they are harmful to humans, these humans also want the human who hate dragons to suffer or die. Dragons and humans can form unbreakable bonds based upon a life changing event, maybe (instead of humans turning into dragons) This seems very much like How to Train Your Dragon.... Which it is I guess...
The Armored Dragon is found as a baby by Reiner, who takes care of it until fully grown after 3 years. Reiner during that time becomes part of a rebellion against those who hate and hunt dragons.