| Category | Heroes | ||||
| Location | Hells | ||||
| Race | Devil | ||||
| Gender | male | ||||
| Title |
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| Title | Duke | ||||
| Alignment | lawful evil | ||||
| Deity | none | ||||
| Birthplace | unknown | ||||
| Born |
In the Creation War (1486 DE - 8777 DE), Geryon was a frontline, glory-seeking soldier of the Nawirrûs Covenant. During one of the war's pivotal battles between leaders, he and four others challenged a formidable Primordial Lord named Demagihr. This creature possessed the ability to create spatial rifts, allowing it to step in and out of its surroundings and reappear elsewhere. Perhaps Demagihr's most perilous capability was a gas that fused objects together. In the melee, two angels succumbed to grievous wounds. The remaining three were knocked down and stunned as Demagihr emerged from a rift above them. Crushed under the beast's weight, they felt their bodies fuse together, forming a grotesque amalgamation that seemed to have crawled out of the Chaos itself. This new, conjoined form granted the three, with minds distinct but bodies united, the power to defeat Demagihr. However, this victory came at a cost, as decades of mental instability plagued them as they each struggled to assert control over the shared body. During this time, despite their valor and numerous deeds, they were shunned, relegated to guarding supply bases and overseeing security forces, with Geryon emerging as the master of the body and the other two minds.
In the God Era, many of the heroes of the previous war battled a new enemy. These were the demonic hordes of the Abyss, the byproducts of Piranoth's haste to build so many worlds. These abyssal hordes invaded the worlds of the Quara'tun System in what became known as the Demon Spawn War (89 GE - 269 GE). Like in the last century of the Creation War, Geryon found himself commanding the security forces of Brucrumus operations. When Asmodeus became leader of the Quarat'un Covenant, he was promoted to general. His first significant mission was to the Forge Worlds. In this system, he conducted a ruthless campaign against Demon raids coming by way of the River Styx. While on the world of Bal-Kriav, he carried out offensives against the demon lord Yeenoghu in the Northern Hordelands and Baphomet across two continents.
When a sentence was passed on Asmodeus by a council of gods, decreeing that he had defied goodness and embraced acts to further his own might, inflicting undue torment on the enemy, his evil was condemned through a litany of war crimes, including the sacrifice of troops for what he deemed the greater good. Geryon, as Asmodeus's right-hand man, was embroiled in this intrigue, for he knew everything and acquiesced - such was Asmodeus's charm and guile. Geryon's close association with Asmodeus led him to follow his master, becoming one of the Fallen Angels. Geryon and the other fallen angels were then banished from the Mortal Systems, compelled to return to Ellubôz.
When Geryon was cast into what mortals call the Hells, his wings were burned, and his body warped into a serpent with three fused torsos. Prior to the Reckoning, he was the Overlord of Stygia. Despite never betraying his master in the Hells' leadership reshuffle, he was demoted, losing command of his world. This was likely part of a deal to broker peace in the Hells and counter the demons threatening to seize Avernus; some say it was the law that a conquered world belongs to the victor. During the Reckoning, Overlord Geryon was outmaneuvered by Duke Levitus, resulting in the loss of Stygia. Regardless of the reason, Geryon has remained staunchly loyal to Asmodeus, believing his old friend has an even greater role in store for him than the title of Stygia's Overlord.