This is Syevux, an Oriental Serpentfang adopted from NightmareRebuff on the SoD forums.

Syevus is rather vindictive- he enjoys taking revenge on those he holds grudges against and other dragons at random.

Syevux is highly violent- he holds grudes for long periods of time, only ending those grudges once he's gotten his revenge or believes that whoever the grudge was against has faded from his mind enough for him to forgot about his revenge on them.

While he doesn't hide it very well, Syevux often will  have the random desire to take revenge on virtually any dragon or viking, even when no reason is given about his actions. With that, most dragons (otherwise meaning basically all) avoid Syevux, most often from the fear of him turning his mind towards them- which, 85 percent of the time, results in their death.