Naberius

Naberius (ナベリウス) is one of the human appearing seraphs displayed in the Seraph of the End series. Seen via memories from the prehistorical past, Naberius was observed within a seraph civilization. Along with others, Naberius was involved with Sika Madu's project to return seraphs to paradise.

Appearance
He appeared as an adolescent male where his black hair was swept back over his head, where the front was slightly messier in style. His seraph features included pointed ears and large feathery wings. Although they were not seen, as other seraphs had them it is likely that Naberius would also have fangs. Naberius's clothing was similar to what other seraphs wore, namely consisting of a hooded cloak of which the hood rested over his shoulders.

Of all the humanoid seraphs shown, Naberius is the only one who resembles another, namely Amon where they are both male youths with shortish dark colored hair. It is a similar scenario for the vampires and demons of later ages that seraphs resemble, where both Noya and Asuramaru would be males though with the shared feature of long hair. For Naberius himself, he matches Noya where other seraphs resemble different beings linked to Sika Madu.

Personality
Appearing satisfied, Naberius was seemingly dedicated to Sika Madu's plan to transfer seraphs to paradise.

History
On Earth, which was referred to by some classification as being the Sol System First Satellite Kingdom, Naberius was present there during prehistorical times. The native beings alive at the time were dinosaurs, where humans had not evolved yet. Living among cloaked members of his kind and Homunculi in the seraph civilization established on Earth, he was involved with Sika Madu's plans. At a gathering of seraphs, Naberius would have been aware of Sika Madu's announcement that the tallest tower among the satellite kingdoms had been formed. After Sika Madu had demonstrated the effects of photons to the seraphs gathered, it was announced how their return to paradise would soon commence. The paradise was specified to be on the Sun where God resided.

While cloaked seraphs were gathered below, Naberius was positioned close to Sika Madu where he was stood on a floating platform. With Bael and Paimon addressing his majesty the King of Earth, along with a group of others, Naberius was thanked by Sika Madu for working so hard and for so long. A blast of fire from a cloaked seraph was seen shortly before Naberius was, as was the case with Amon, then Belial, and Astaroth. The same occurred for Marbas, and Bathin too. In addition, Naberius would have had Raum, and Orobas around him as well.

Story
The existence of Naberius was revealed to Yu and Mika after they used demon-based powers to access memories to the past. Where Yu and Mika discussed how the angels in the memory, they were accessing looked familiar, Bael resembling Urd, and Paimon looking like Saitō were noted. Naberius however may not have been recognized as being similar to Noya who was briefly seen, with horns and long hair.

Sika Madu
Having worked to some capacity with Sika Madu, the King of Earth, Naberius out of other seraphs was afforded a position close to him. Apparently sharing a goal to return to paradise, the Tower of Babel may have been one project to enable this.

Trivia

 * Naberius as a name is one used in reference to a Marquess of Hell, a character who is a demon in demonology-based works of literature. As with other seraphs, Naberius shares with them the fact that they all have demon names.
 * From the fire that erupted out of where their heads would be, and the floating embers around him upon his reveal, it is possible that a transformation occurred where one of the indistinguishable cloaked seraphs formed into the human appearing Naberius.