In the Hebrew Bible, it describes the seraphim as winged celestial beings with a fiery passion for doing God's good work. The seraphim do not have the status of angels, and that it is only in later sources that they are considered to be a division of the divine messengers. The implication here is that these angels burn with love for God and seem to bear a resemblance to humans, as Isaiah describes them as having faces, feet, hands, and voices.
Many holy books place the seraphim in the highest choir of the angelic hierarchy. They are the caretakers of God's throne, continuously singing "holy, holy, holy". Pseudo-Dionysius drew upon the Book of Isaiah in fixing the fiery nature of seraphim.
In the Book of Ezekiel and (at least some) Christian icons, the cherubim is depicted as having two pairs of wings, and four faces: that of a lion (representative of all wild animals), an ox (domestic animals), a human (humanity), and an eagle (birds). Their legs were straight, the soles of their feet like the hooves of a bull, gleaming like polished brass.
The cherubim are a group of angels recognized in both Judaism and Christianity. The cherubim guard God's glory both on Earth and by his throne, work on the universe's records from the dawn of time, and help people grow spiritually by delivering God's mercy to them and motivating them to pursue more holiness in their lives.
The ophanim, alternatively spelled auphanim, ofanim, thrones and even galgalim, refer to the wheels seen in Ezekiel's vision of the chariot. Late sections of the Book of Enoch portray them as a class of celestial beings who (along with the Cherubim and Seraphim) never sleep, but guard the throne of God. The ophanim are equated to the "Thrones" in Christianity when it lists them all together, in order: "...round about were Seraphim, Cherubim, and Ophanim".
The "flaming" four eye-covered wheels (each composed of two nested wheels), move next to the winged Cherubim, beneath the throne of God. The four wheels move with the Cherubim because the spirit of the Cherubim is in each of them.