Slinger used to be a barman in Kaon, before losing his job due to a gunfight breaking out in the bar after a meeting between Megatron and Orion Pax gone wrong. After that, he joined the rebel group I was leading in Nyon He helped me lure Pax to the Acroplex to try to talk to him about what Zeta was upt to. He was also the one to convince me to go through with the contingency plan. After Pax became Optimus Prime, he represented the neutral population in Optimus's Grand Convocation. He joined the Decepticons after he became disillusioned with the Autobot government, while I joined the Autobots, which meant I ended up having to face my best friend in battle. That hurt about as much as you would imagine, especially when he said I was a disgrace to Nyon's dead. Despite all this, he saved me from Onslaught, being ripped apart for treason in the process. I think the fact that I've written down only the facts makes it obvious that I try not think about him too much.