Cretaceous

Cretaceous (白亜紀), otherwise known as The Last Iron Giant (最後の鉄の巨人) is an male iron giant, and regarded as the very last of his kind. The sole survivor of the iron giants, it's been said they all perished during the Second War and the which they sided with the humans; the Dragon Slayers against the anti-human dragon faction. Cretaceous fought on Eurasia, but forced to fled after the arrival of Acnologia decimated the giants. He'd then wandered all across Earth Land towards Ishgar and even the Beyond.

Docile being Cretaceous is, he's typically known to ignore most sentient life, acting passive according to reports through the centuries. However when angered, he's considered an Wizard Saint level threat which many perished due to the sheer strength he has, including having adamantine armour that believed to be indestuctible, and capable of absorbing the ethernano from spells, thus he's able to easily take powerful blows of spells.