A'ovan

The A'ovan are green-skinned humanoid beings that share the Na'conda planet with the blue-skinned Thraal. The two groups do not get along very well, which likely is the fault of the aggressive Thraal. Worse for the A'ovan, they are the physically inferior one of the two species and also appear to have a technological disadvantage to the Thraal, as the Thraal are seen using battlesuits and the A'ovan not.

Fiction

Titan movie comics

Ratchet got stuck on the A'ovan's and Thraal's planet after an incident involving a foldspace warhead. At that time, the A'ovan and Thraal were at war with each other. Upon scanning a Thraal tank to blend in, Ratchet additionally received information from the tank's onboard computer about the reasons and current situation of the war. An all-out attack by the Thraal on the last A'ovan stronghold motivated Ratchet to interfere, and he engaged the Thraal leader, Durguth, in combat. Due to the Thraal's hierarchal system, none came to help their leader or continued the battle against the A'ovan while Durguth's authority wasn't certain. Ratchet won the battle, thereby becoming the new ruler of the Thraal Imperium. Being an Autobot, Ratchet used his position to mediate between the A'ovan and Thraal and end the war. Lost In Space 1: Ratchet

Animated cartoon continuity

The A'ovan were at war with the Thrall [sic] on Na'conda. The AllSpark Almanac II

Ask Vector Prime

Spacewarp hunted and captured the fugitive A'ovan warlord Pya'dorus the Pitiless. Ask Vector Prime

2019 IDW continuity

Fleeing the warlike Thraal, The World In Your Eyes Part Five a population of A'ovan refugees were among the many alien species that took up residence on Cybertron, The World In Your Eyes Part Two settling into Iacon's Xeno-Quarter in a specially constructed A'ovan habitat, an arcology designed to recreate their ruined homeworld. This situation made them the only species in the galaxy unique to Cybertron. The World In Your Eyes Part Five The A'ovans brought with them the invasive skitters, who stowed away in their refugee ships and quickly adapted to life on the metal world. The World In Your Eyes Part Two Though the majority of the Thraals were content with having destroyed the majority of the A'ovan race, a vocal minority pushed for their government to finish the job, their diplomats occasionally asking Sentinel Prime to released the refugees to them to try and appease this minority. Nautica: Home