Ray

I know it sounds like I'm making this up, but Ray the dragon has been an  OC of mine since before Sunset Shimmer's pet gecko was ever revealed.  He was always yellow and he always had that name.

Since the  universe clearly meant for this to happen, I decided to just roll with  it and make his design match that of the gecko. I didn't have to change  very much at all.

Ray is the father of Caldera,  making him the biological grandfather of Smolder and Garble. He  commanded the Ridgelands as its Alpha (of the first rank) until the  region merged with the Green Valley region. He has also been Torch's  best friend and most trusted ally basically since Torch became the  Dragon Lord, for better or worse; Ray doesn't always have the best  advice but he means well.

Torch was a wildly  unpopular leader at the beginning of his reign. He had revolutionary  ideas that didn't sit well with many of his subjects, especially those  who were older and in positions of power. Ray took a liking to the young  visionary, though, and it's thanks to him that Torch survived his first  couple of centuries as Dragon Lord. He continues to call Torch "little  brother" despite the former being much larger than he is now.
Ray  himself was rather disliked by many of the same dragons who couldn't  stand Torch and they often referred to him as "the banana".

In  general Ray's heart is the right place, even when his methods can be  questionable at times. He has a very laid-back personality. He doesn't  take himself too seriously and loves to make terrible jokes, much to his  best friend's chagrin. He can be fairly slow to figure things out and  is very impressed by how smart Torch is, taking his word for just about  everything. Non-verbal cues or things that are implied but not directly  stated often go over his head, so he appreciates his little brother from  another mother's uncharacteristic patience with him very much.
Everyone thinks he's insane and they're not entirely wrong about that.

In  spite of his small stature and feeble appearance, Ray is quite strong  and athletic. He is still one of dragonkind's fiercest warriors despite  his age. He is also blessed with incredibly good luck, which rubs off on  the dragons he surrounds himself with. He likes ponies and doesn't see  why the other dragons despise them so much. The only time he had an  issue with them was when they put Caldera in harm's way as a baby  dragon, but he never held it against ponykind as a whole.