Haruman is a narzugon first encountered on the streets of Elturel. When initially spotted, Lulu recommended the party avoid tangling with him, so he was avoided. Later, after leaving Harkina, Shorah, Ezo, and Brask in what was assumed to be a secure storage room with Reya charged with their safety, the party returned to find Reya grievously wounded and near death. She described a mounted knight in dark armor who had attacked and abducted Harkina and the children.
The party pursued Haruman, confronting him outside of an abandoned domicile. Haruman taunted the party, seeming to know more about them than they knew about each other. Astride his nightmare, Lochus, Haruman was able to ethereal stride to safety, informing the party that their business was not yet concluded. During the fight, Harkina perished when the building collapsed, and the children were never found.
Once in Avernus, the party located a place called “Haruman’s Hill.” Here they were confronted again by Haruman and Lochus, and while better prepared and still able to force the narzugon to retreat, the battle did result in Lulu’s capture by several Hellwasps.
Upon rescuing Lulu, a strange man identifying himself as Ivor Bodkin claimed to know where the children Haruman had kidnapped were being kept. He lead the party to a secret door that lead to a cave system underneath Haruman’s Hill. The caves were under construction, Haruman having conscripted dozens of devils to build tunnels and rooms out of the rock. In the center of the hideout, a room protected by locked, secret doors was eventually accessed revealing Haruman’s primary quarters. The party found several iterations of designs for the underground bunker, and a cage containing Harkina’s twins, Ezo and Brask. The children appeared to have been tormented and were exceptionally mistrustful. As the party tried to soothe them to gain their trust, Ivor Bodkin betrayed them once the cage was unlocked. Building a magical wall to mask his efforts, Bodkin collected the children and plane shifted them away to an unknown location.
On the way out, the party met Thullmur, a cowardly nabassu who revealed that Haruman had vanished after his defeat on the Hill’s surface and had not returned. She claimed to know nothing of the children’s whereabouts, but did reveal that the kids had been part of some long project Haruman had been working on that was nearing completion. At least until Ivor Bodkin’s double-cross. Thullmur confirmed that Haruman had studied the party, even referencing his repeated derisive nickname for them, “The Flaming Hypocrites.” She also suggested that something even before the abduction of the children had seemed to make Haruman desperate and his unexpected absence might be related to that.
A few days later, the party returned to Haruman’s Hill and the hideout underneath, in an attempt to surprise the narzugon or find more information. After some effort, a curious passageway in the southeast corner of the compound was accessed, revealing a ceremonial room that, by all appearances, had been used in some sort of cruel and grotesque ritual involving other children. Potentially Harkina’s twins had been fated for the same vile ceremony, but with no further sign of the children or the narzugon, the party was forced to settle for destroying what they could of the ceremonial room and leaving Haruman for another day.
Later, the party found themselves in a remote corner of Avernus, accessible only through a magical gateway known as the Arches of Ulloch, where Zariel had imprisoned a demon prince by the name of Kostchtchie. The party was tasked with releasing the demon in an effort to distract Zariel, but they found that Kostchtchie’s jailer was none other than an ascended Haruman. Now fused with Lochus into a winged, centaur-like pit fiend, Haruman mocked the party as usual, but despite his newfound power he was thwarted when the Fist were able to sever his connection to Kostchtchie’s magical bindings. With the vengeful demon prince seeking retribution for his imprisonment, Haruman once again was forced to retreat, screaming yet again about seeking future vengeance.