Chainclaw

Profile
"The only thing for certain is uncertainty."

Hypochondria and paranoia paralyzes Chainclaw. He focuses on every minor technical problem until he's convinced he has some metal-eating disease that's going to destroy him. Chainclaw even worries that his gun might backfire and maim him or that his shell won't unlock when he needs to get out. He makes things worse by imaging all the horrible ways he and his Autobot comrades could be killed in battle. He's negative and unhappy with the world, but he struggles on even though he wonders what the point really is. All his worrying and frustration is channeled into ferocious action once he starts fighting.

History
At some point in the past, Chainclaw was one amazing Autobot. Fearless, noble, unbeatable in battle- he was a guy that could give Grimlock a run for his money and make the Wreckers look like a small group of Bumpers. So when the Decepticons attacked a small moon called Panser to raid it of natural resources, Chainclaw was an obvious member of the response team. The Decepticons were driven away, and Optimus Prime chose Chainclaw to remain on Panser to help defend their civilization (much like the Monsterbots in that Battle Beasts episode of Headmasters).

The ice covered moon of Panser was the home of intelligent aliens very similar to bears that governed themselves by tribe and fought wars and drank ale and celebrated the warrior way. Chainclaw took on a bear alt mode, and eventually took it a step further with the creation of his Pretender armor. He eventually became more of an Autobear than an Autobot and fell deeply in love with his adopted home: it was a paradise.

Of course, the Decepticons eventually returned. The bear tribes were destroyed, and Chainclaw was left for dead, his confidence destroyed. So hes a bit of a broken old soldier now, full of doom and gloom, with glimpses of his former mighty self shining through when hes able to focus.

Chainclaw is sort of like Tigatron. He roams around on his own being a sadpants and shows up every now and then and everyone goes 'oh yeah that guy!'