Relationships
In the "Demonomicon of Iggwilv" and "Fiendish Codex I: Hordes of the Abyss," Graz'zt is listed as Pazuzu's most notable enemy. Graz'zt alone takes umbrage at Pazuzu's claim to dominion over the skies of the Abyss, though the Prince of Tyrants has never taken action against him beyond the occasional insult. Pazuzu is also opposed by the obscure demon lord Lamashtu, "She Who Erases", the Demon Queen of Monstrous Births and Deformity. She was a former consort of Pazuzu, and is the only being who knows Pazuzu's true name. She betrayed him, and in response he ate her eyes and imprisoned the Queen of Monstrous Births on Torremor, where she has remained ever since.
The 4th edition Demonomicon establishes that Pazuzu's most powerful and secret ally is Asmodeus. In the new default setting, Pazuzu aided Asmodeus in obtaining a sliver of the shard of pure evil that festers at the bottom of the Abyss. The sliver became Asmodeus's signature Ruby Rod, which the angel used to slay the god he served. Those few who know of the ancient deal believe that the King of Hell has yet to repay Pazuzu for this "favor".
Read more about this topic: Pazuzu (Dungeons & Dragons)