Hydrau is an illegal gladiator who battled in the hidden gladiatorial arena beneath Iacon itself. He was a creaking cast-off of some industrial enterprise. He wore his own name painted across the backs of his shoulders.
He won a match against a numberless horde of Minicons. Sadly, his combat partner was not so lucky, dying in the match. As the crowd celebrated, Megatron commented, with a smile, that he might have found some competition. Orion did not believe it for a moment.