Set Amenhasensahib was born to the descendents of Theuban refugees and was the oldest of three surviving siblings from his clutch. He followed his father's footsteps into alchemy unlike his siblings, earning a Doctorate and being hired by childhood friend Saskia Byrne to be the forensics expert for her private detective business. His first creation was a Vial of Acid.
He married his wife Ishtar Amenhasensahib while still studying and they had one son, Grand Order of Wizards alchemical researcher Rameses Amenhasensahib. It was also around the time that he met his wife that he created the Unknown named Unknown, who would be his assistant and near-constant companion for much of the rest of his life.
During the events of Troll Bridge Association he works along side Saskia Byrne, Astra Yaevis and Saskia's pet Bronze Dragonling. U ndercover, he served briefly as a cleaner alongside K'nul before receiving help and advise from Lord Barnabus and being shifted to working as a alchemist in the Forgery Detection department.
Set died on what he intended to be his final excursion under Saskia's detective agency after being impaled on the limb of a giant spider infected by Vampirism. Sadly, his son hatched shortly after his death, meaning that he was never able to meet him. His death led Saskia to close down her detective agency and move into a different profession, and also led Ishtar to begin publicly protesting for better protections and insurances for the families of people who die under the Imperial Troll Empire Government's watch. However, he did inspire his own son to follow the same footsteps as he did; Rameses ended up becoming a well regarded alchemist in his own right and eventually an alchemy researcher for the Grand Order of Wizards.