The Baali are a bloodline of vampires associated with demon worship. Because of their affinity with the unholy, the Baali are particularly vulnerable to holy iconography, holy ground and holy water. They are highly vulnerable to True Faith.
Some versions present the true purpose of the Baali as keeping demons sleeping by feeding them with carnage and destruction. But most presentations show them as infernalists, using demon worship to gain additional power.
They have a somewhat complex heritage, appearing at times as a bloodline and at times as a clan. There is some indication that they may be a bloodline of the Salubri, Cappadocians, or Tzimisce, although one earlier source suggested they may instead be descendants or even predecessors of the Gangrel line. They also recruit vampires from other clans to become Baali via a dark thaumaturgic initiation, further confusing the issue and making them also a sect or cult.