Despite a level of skill to match any Decepticon warrior's, Breakdown is almost crippled by a persistent paranoia, especially when he is in crowds. He is much happier working alone, away from the eyes he is sure are watching him at every moment. That said, he is quick to come at Megatron's call, as his fear of his powerful leader may be the only thing outreaching his agoraphobic tendencies.
On present-day Earth, he's Knock out's assistant, apparently at some point having traded his paranoia for a bulkier frame and the bearings to match. He has also become somewhat careless in battle, having directly or indirectly damaged Knock Out on more than one occasion. He also has a dispute with Bulkhead.