Flügel

The Flügels are the sixth ranked race of the Exceed. Their homeland is Avant Heim, a floating city in the sky. The kanji for their name can be read as angels, but Sora noted that they are more alike to demons, as they hold powers of mass-destruction and massacred countless others during the ancient war. There are 18 Flügel council members that govern Avant Heim.

Flügels are ancient warriors created by the gods, one of whom was Artosh, to fight their wars for them. While their combat abilities are sealed by the Ten Oaths, they still retain immortality as well as high magic ability. Due to their nature, Flügels tends to have violent thoughts and are harsh and sarcastic. After the declaration of the Ten Oaths, the Flügels began collecting knowledge all over Disboard by robbing the other races of their books and as Disboard is a world without printing technology, these robbed books were not easy to replace. When their homeland became stacked with books, the Flügels passed a law to share the books amongst themselves.

The Flügels are known to have collected the skulls of their slain enemies. Although they now mainly collect books due to the implementation of the Ten Oaths, the skulls are still displayed within their homes, as noted by the skulls in Jibril's library.

Etymology
Flügel means wing in German

Flügel