Melchom is mentioned as a demon in the Dictionnaire Infernal. Melchom was formerly held as a major deity by the Ammonites (a people who occupied an area of the country known today as Jordan) until he and his people were chased out of the area by King David and the Israelites.
After being dethroned he was regarded as a lesser demon, often depicted with a wallet, taking up the office of the paymaster to the servants of Hell. It is not known exactly what his duties are from being the comptroller of the chamberlains, but it believed that he is the one handing out the paychecks to the public workers of Hell. The rest of his duties remain a mystery. He possibly holds some connection to Moloch.
"The paymaster of Hell. He is often depicted with a wallet. It is not known exactly what his duties are as the comptroller of the chamberlains, but it is certain that he is the one handing out the paychecks to the public workers of Hell."
—Strange Journey compendium
Melchom appears as a recruitable enemy in the basements of Sector Antlia. A lone Melchom, stationed at Sector Bootes will issue several EX Missions, requesting MP-restoring items and paying top Macca for them. Once his final request has been granted, he will bestow the protagonist with a Melchom Ring for his services.
His personality archetype is that of the classy gentleman.
"The accountant of hell often depicted as a demon holding a wallet. He is said to be the official in charge of the chamberlains' expenses. It is certain that Melchom hands out the paychecks of hells' public servants, but the rest of his duties remain a mystery."