Aelius

Aelius (アエリウス) is one of the five Overlords that guard the library, Ashurbanipal of the Great Tomb of Nazarick.

The Two Leaders Arc
Aelius along with his fellow Overlords: Aurelius, Cocceius, Fulvius, and Ulpius escorted Mare to the lizardmen village to search for Cocytus.

Abilities and Powers
Considering the fact that Aelius is an Overlord, he must be at least level 80.

Titus Annaeus Secundus
Titus is Aelius's superior and is under his command.

Trivia

 * Aelius's name is based on a Roman Emperor.