There are three types of guardian angles in wow alliance: Gryphon, Hippogryph, and Metro Mine Road. The noble Gryphon is the symbol of the fortitude.
It will provide help when Alliance needs. They can transfer important documents for the leaders of the Human, Dwarf and Gnome in Storm wind city and Iron forge.
Moreover, they can also deliver the passengers who have paid the transportation fees to different routes of the territory which is controlled by Alliance in wow. Hippogryphs swear loyalty to Night Elf in wow gold.