The Infardi were Chaos cultists on the Shrine World Hagia, who composed the primary force opposing the Imperial Guard on Hagia during the Sabbat Worlds Crusade. They took their name from the local word for "pilgrim," since they practiced a debased form of worship devoted to the Chaos Gods and deriding the Cult of the Emperor.
They were led on Hagia by their general Pater Sin.
The Ayatani, the native priesthood of Hagia, refused to refer to the Infardi as such, instead calling them Ershul, their word for a Chelon (a large livestock animal) that eats its own droppings.
The Infardi wore robes of emerald green, in mockery of the religious garments worn by Hagia's priesthood, and several were tattooed with Chaos runes and heretical images of Saint Sabbat in congress with Daemons.
It is presumed that the Infardi were destroyed upon activation of the psychic amplification device beneath the Shrinehold of Saint Sabbat, save for Pater Sin, who had fled Hagia some days before.