Tormentor

Tormentor is the Catastrophic Quaken that lives in Dark Deep. He made his debut in Quake, Rattle and Roll.

Personality
Tormentor was a bit of a bruiser, bullying and chasing away the Gronckles of Dark Deep. However, Fishlegs discovered he was just being defensive because he was all alone.

Thanks to the help of Meatlug, Tormentor had become very friendly to the Gronckles as he was willing to share his home with them to make Dark Deep a more peaceful island. He even showed forgiveness by breaking large boulders to feed his new friends.

History
Tormentor lived in his cave on Dark Deep. One day he took over the island, sending all the Gronckles to Dragon's Edge.

Hiccup and Fishlegs discovered the dragon and were forced to retreat. Fishlegs began to work with Snotlout to fight Tormentor and chase him away from Dark Deep.

During the final confrontation, Meatlug defended Fishlegs from Tormentor, putting the two Boulder Class dragons in a stare-down. Meatlug was able to see that Tormentor meant no real harm, but was actually acting out of defense. Once Meatlug showed him kindness, Tormentor was accepted by the Dark Deep Gronckles and began happily living in peace with them. After this, he appears to have a small crush on Meatlug, though it is unknown if she returns his affections.