Angel

Not much is known about them, except that they descend from the gates of heaven every 500 years, in what is known as the Tenma Wars, to reign destruction on civilization.

Abilities
As the average angel is deemed around B rank, and with commanders even higher commanding them, the power they possess is not to be underestimated. They wield a racial advantage over Spirits, but are respectively disadvantaged against Demons.

 Trivia 

Even though angels are very strong, during the Tenma war they always lost. ( THIS INFO IS TAKEN FROM VOL 7, 6 )