This is Shimmer (My favorite HTTYD dragon). Wyndbain made the base, but I colored her in. Shimmer is an adult female Lightfury and a prisoner in dragon gladiator fights. 

This is Shimmer's brother, Kraken. He works alongside her in the gladiator fights, and he was even once forced to fight her, though they didn't kill each other because they are rare.

This is Blast, a male Monstrous Nightmare / Nightfury. He is trained under the Dragon Riders and is fully harmless. 

This is Flight. He was captured as a small dragonet for illegal dragon racing. (The blue and red on him is flight paint showing his team)

This is Catalyst, a female Nightfury / Lightfury. She was captured by dragon hunters when she was a little dragonet and has been living in captivity ever since.

This is Bolt, Flight's older sister. She was also captured for illegal dragon racing. (The colors are paint, like Flight's)

COMMENT WHICH ONE YOU LIKE THE BEST!!!!