This is the Red Key, also called Blood Key, Flaron, from my CS Comic, 4Key. He is the Gas Emblem, and his element is fire.
Flaron: Flaron is the strong-and-silent type, though not when it comes to the memories of what had consumed most of his life, which is pain and misery in the dungeons of Deathlock. A setting sun was roughly painted for some strange reason on the walls of his cell in the strange, prison-like, evil place, and after his escape with Aeayuri, he's felt the need to watch the sunset, as he needs to see the sun actually move in order to be convinced that he's free, and the sky is not an illusion painted on brick. He likes to dwell in the shadows and on the "edge of the crowd" all alone. As he is a Key, the Blood Key, the Black Key captured him long ago and have had him in their possession ever sense, and the evil-doings placed upon Flaron has misshaped him to a quiet, brave-yet-fearful dragon. He will attack anything besides The Black Key, especially Thezar or Alias, as his greatest fear is winding up back in their possession as a prisoner back at Deathlock. He's shy and quiet, but fierce when need be. Because of his painful past, he has no fear of death, and will sacrifice anything within his power and right to sacrifice to save his friends, as he is forever loyal to the dragons that freed him.