Knock Out is- essentially- the Decepticon's version of Ratchet. However, rather than being grumpy, Knock Out is cheeky, sassy, flamboyant, and a bit cocky (bordering on narcissism). He is also quite vain and values his own appearance above everything else, even above the welfare of his patients; he is also shown to not like losing very much. Knock Out won't hesitate to grovel or even change sides if the situation warrants it. His loyalty to Megatron only went as long as he is in the spot light. 