Always have on hand a list of the Archangels with minunciosas descriptions, and details of all other celestial militias, as St. Thomas Aquinas, in Summa Theologica (1225-1274):
Seraphim, Cherubim, Thrones, Dominions, Virtues, Powers, Principalities, Archangels and Angels

Angel (angelus of Latin and Greek Angelos (ἄγγελος), messenger), according to Judeo-Christian tradition, the most widespread in the West, according to biblical accounts, are spiritual creatures, servants of God as men (Revelation 19:10) who serve as helpers and messengers of God. In common iconography, angels usually have bird wings, a halo and has a delicate beauty, emanating strong brightness. They are sometimes represented as a child, by her innocence and virtue. Bible stories and Christian hagiography say that the angels were often authors of miraculous phenomena and the current belief that this tradition is one of its missions is to help humanity in its process of approaching God.