Grimlock

His aft engines were massively more dense than Slingshot’s relatively weaker frame, and Wheeljack had built all his armor twice over in the last four years, each time finding new atomic structures that were at once stronger than the armor he had once built for his Autobot companions, and light enough to meet Decepticon flight requirements.

[...]

“Raarrgh!” Grimlock yelled. “Grimlock eye hurts!” and in a fury simply smashed his massively armored head directly against Cyclonus’s.