Nightstalker

Nightstalker is the Commander of the Demicons, a loyal servant to Starscream and a creation of Quintessa's. Armed with a deadly Fusion Cannon and Minigun, Nightstalker is more than a match for any Autobot or Decepticon unfortunate enough to get in his path. Intelligent, Nightstalker seeks to prove his might by personally terminating both Optimus Prime and Megatron respectively. He has been known to sometimes question Starscream's ability to lead others.

In one continuity, Nightstalker was introduced as a member of a group of Transformers called "Dragicons," Transformers capable of turning into dragons from the How to Train Your Dragon film franchise.