Canon material has presented multiple events that legitimize the possibility of either. Optimus Prime has been the target of Knock Out's attention on more than a few occasions, though OP's impression of him is left out of the equation, as in each case he has maintained a cold external countenance. Though currently we are presented with the unique situation in which KO is shown working on him, with OP lacking all previous memories of their interactions. Possibly an opportunity to create a new impression? Breakdown, on the other hand, has long had an amicable relationship with his partner, unusual for the Decepticon faction. Even following his humiliation in being captured by humans, KO has never insulted or made fun of his subsequent handicap, in stark contrast to other characters such as Megatron and Airachnid. They seem completely comfortable around each other, which some may interpret as a strong basis for relationships of another sort. Thoughts?