Guardian Angels [Unofficial Name]

In the world, there a four forces of nature. Humans -- the unaware, religious race that will do anything that are told to them. Angels -- the messengers of the Gods. Demons -- otherwise known as Fallen Guardians, they are often the ones promoting sin and deeds outside the law. Finally, there are Guardians, also known as Guardian Angels; however, they are not like how they are depicted in stories. They are the mediators. In order to prevent the other powers from becoming too powerful, they raise and destroy; destroy the strong and protect the weak. They could be counted as the Bringers of Fate as well. So what will happen when a Guardian Angel finds herself protecting a regular human female who has the unnerving ability to keep balance in the world without the help of a Guardian Angel?