Eberron - Dreams of Xen'drik
Ironsides was a warforged fighter and a member of the adventuring group known as The Savage Company. Ironsides’ body is made mostly of reinforced adamantium, making him a literal bulwark of defense in a fight. He is a loyal protector of Jackson Savage, inserting himself into any fight or altercation that Jackson gets involved in unless Jackson himself directs him to stand aside. No one but the two of them knows what it is that has made Ironsides so fiercely loyal to Jackson, but the warforged almost never leaves his side.
After Berenessa stole the Dreamstone back from Jackson Savage, it was revealed that Ironsides was a figment of his imagination, and vanished back into the ether from which he was made. With Jackson’s death, it seems the city has forgotten he existed.