The Four Archangels (四大天使Yondaitenshi) is a group of high-ranked Angels in the White World.
Z/X Encyclopedia Entry
The organization resting at the apex of the White World, it consists of the first Angel, Uriel A.T., and the three Angels who were "awakened" by Uriel (Raphael, Gabriel and Michael).
Each of the Four Archangels awoke three Angels themselves, the twelve newborn Angels were known as the Twelve Apostles and became the rulers of the White World. Below is which Angels of the Twelve Apostles were awakened by The Four Archangels.
Following the great uprising "Gambiel War" that was waged in the White World, the Four Archangels was reduced into a state of emergency as it was missing three of its four members. For that reason, the remaining Archangel Michael implement the reorganization of the structure of White World. Capricorn Hanael inherits the name of Gabriel, and the two takes the title of "Twin Polar Angel" together, becoming the two greatest authorities in the White World.
The Twelve Apostles is also included in the reorganization effort. Aquarius Gambiel is reincarnated as a lowest-ranked Angel after being subjugated, and Sagittarius Adnachiel starts her activities as an Asipu across the border of White World (it seems that she is always get lost or being absent from her fellow Twelve Apostles). All of the Twelve Apostles who able to perform the essential duty to protect the public order in White World are placed under the command of Gabriel.
Moreover, Nina Shitori obtained the position of "Rainbow Angel" as the representative of Z/X users who has saved the White World. The girl who obtained authority equal to the Twelve Apostles is now assuming the role of auditor of the White World that is going to change.
Aries Malchidael / Taurus Asmodel / Gemini Ambriel ※ Missing after breaking through into the Dynamis together with Uriel.