Viper

When G.I.Joe first met Viper, they fought that he was just a very advance robot, to advance even for them, however when they got to know him better, they realised his origins are more extra-terrestrial as Viper, was in fact an ancient war machine from a cybernetic race called the Cybertronians.

A member of the Decepticons, Viper is pretty  repulsive on his behalf, not many Decepticons like him much, though he’s quite friendless, he doesn’t mind to much because he’s a bit of a loner. He’s resourceful to, as he solely was the one to make the alliance with Cobra.

He’s also a good piolet, and turns into a Cobra Rattler

History:

Viper was  born during early Sentinel times and joined the Decepticons Around the time of the Great war and was part of Trannis battalions. Viper was seen talking to his commander General Trannis when Stranglehold came with the daily report.

He was later seen with Fangry fighting Stranglehold because of a disagreement but lost to him, however Fangry stunned Stranglehold but both bots had to escape when the Autobots came[Spotlight Stranglehold]

He was with his commander Trannis  When reporting the death of Drixco, amongst others[The Great war: rise of Optimus]After Trannis was killed, he was put under Gigatron’s care, When Gigatron lost power he was one of the few Decepticons loyal to him.

He was also the bot that took him to earth on his small cargo ship, as well as chosen the other crew’s alt-modes. At somepoint he made an alliance with Cobra and helped them build their Weather machine[G.I.Joe Vanguard 2 of 4]

He was helping Cobra on their M.A.S.S device when the machine malfunction, after getting information from Munitia, he noted that said malfunction was caused by a Spacetime even which caused the malfunction to happen.

However unbeknownst to her, this was caused by Croc master teleportation[Arrival of Croc master]When Croc master seemingly tried to kill Serpentor, viper shot him, only for Croc master to revert to his energy form[Reveal of Croc master]

He later was at the African Savannah when he engaged Shakedown and Duke and co after Shakedown uppercut Sohawk[Transformers vs G.I. Joe 1 of 4]ending up with a fight with Shakedown, and later with Guzzle and Smokescreen.

when Sohawk was defeated, Viper abandoned the battle to get her to safety, and used the M.A.S.S device to teleport back to Munitia ship on Europa, with the latter scolding him for using said device rather then their own unspace drive, as it could get them caught sharing Cybertronian technological secrets with Cobra[Transformers vs G.I. Joe 2 of 4]

He was at Cobra island when a joint G.I.Joe/Autobot/Acanoth strike force invaded the island, and went to stop them[Transformers vs G.I. Joe 3 of 4]Ending up in a fight with Guzzle and Musket, which he lost, he was later saved by Sohawk via Munitia ship orbital jump tech, before he was taken to the medical bay for repairs[Transformers vs G.I. Joe 4 of 4]

He also helped them in Project Zeus, after filling up his ship, he decided to go to Europa, and though Serpentor was a bit sad, he was fine with it[G.I.Joe Vanguard 3 of 4]

Notes:

He’s based on CW Viper

He shares his bodytype with Powerglide, Dogfight and Wingblade

He turns into a variant of a Cobra rattler