Angel
Angels are heavenly beings that act to oppose major changes and beings that threaten the universe. If something changes or challenges the universe intentionally and causes a great disturbance, an angel may be dispatched, with the minors ones who have just enough power to handle the situation. They act as a counterbalance for demons and those who call upon their powers are Evangelists.
Types
Angels come in different forms and it is suggested that there are different choirs, at least seven, that handle different parts of the universe.