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. 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 resemble seraphs from this time, where both Noya and Asuramaru would be males though with the shared feature of long hair. For Naberius himself, he matches the vampire turned demon Noya where other seraphs also resemble different beings linked to Sika Madu.

Personality
Appearing satisfied, Naberius was seemingly dedicated to Sika Madu's plan to transfer seraphs to paradise. Fine with sharing what he has to say, Naberius also appears happy that their goal is within reach. Paying attention to details, Naberius picked up on the words seraphs used. He had quick reactions which were used to help others. Appearing determined, Naberius alerted others to the incoming danger and decisively acted to save Amon. Naberius did not appear afraid as he saw a meteor came towards him.

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.

After Bael and Paimon had passed away, Naberius joined the remaining angels in seeking Sika Madu out who was before their graves in a valley filled with cross-shaped markers. Stood in between Bathin and Raum, he awaited Amon to relay that the Tower of Babel now held the necessary power to return them to paradise.

Once Sika Madu commented on whether there was any point given the angels who had died, which also included Belial, he questioned what his Majesty was saying. Naberius raised how they had worked for tens of thousands of years before wondering was it not for this day.

"What are you saying Majesty? Haven't we worked for tens of thousands of years just to reach this day?"

- His question for Sika Madu with the tower now ready with the light to return them to paradise.

After his view was supported by Astaroth, and Sika Madu stated they were right, Naberius heard his order to pass the word to everyone, that they return tomorrow. Pleased with this news, Naberius shared a smile with Raum.

Outside the seraph city, it is probable that Naberius was part of the group that witnessed a gigantic homunculus darkening the halos of light in Space. What he certainly did hear is the seraphs with trumpets who had appeared announce that a taboo had been broken. The sun-like orb with streams of electricity is also visible to him. Stood near Raum and Amon, he asks aloud what the seraphs meant where he focuses on the punishment word they mentioned. Given events, Naberius also questioned were they not returning to paradise having recalled that.

"What did they mean by "punishment"? Weren't we going back to paradise?"

- Registering the seraphs' communications after a sphere of light has been formed by them.

The lightning strike that cracked apart the Tower of Babel would likely have been observed. While Naberius may not have known that the meteor shower descending towards them was initiated by another humanoid angel, he would regard with shock the tremendous amount of fire streaks coming towards them. Turning, Naberius alerted the others that they were coming this way. Commanding Amon to dodge, Naberius saved his life by pushing him to safety out of the trajectory of one of the projectiles.

Although Naberius is able to notice the fiery missile hurtling towards him, he is unable to avoid it. His hand still outstretched having pushed Amon away, Naberius' head is struck by the fire where the meteor strikes further into the ground. Feathers from Naberius' wings gently float down where he was the first known casualty of the seraphs commencing their operation to end Earth. From what the seraphs using trumpets communicate, like all others of the Earth kingdom, Naberius' soul would be bound to the planet.

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. When Sika Madu questions if there is a point to returning to paradise, Naberius is fine with challenging his view and raises the amount of effort they have put into the campaign to do so. While happy at Sika Madu's claim they were to return, Naberius would not know that he had instigated a plan to resurrect the fallen seraphs. Unaware of this plan, Naberius' fate was affected by the seraphs who sought to punish Sika Madu by murdering all his followers himself included.

Raum
A humanoid angel, Raum is a part of the same group as Naberius where they work with Sika Madu. Among others who head to see Sika Madu in the valley of angel graves he stands beside him. Once it is confirmed they are to return to paradise, Naberius shares a smile with Raum.

Amon
When Amon with himself and others come under attack from fire-based missiles, Naberius acts to save him. Immediately shoving him aside, Naberius succeeds in sparing Amon's life then. His selfless act would help Amon be the only one to reach Sika Madu's location.

Bathin
Where Bathin is another human appearing angel, Naberius stands beside her when reporting to Sika Madu. He was like Bathin in that they were both quick to act in the face of dire circumstances.

Astaroth
Like Astaroth they are younger appearing angels. When Naberius addressed Sika Madu's question on whether it was worth returning to paradise, Naberius had support for his view from Astaroth.

Belial
Similar to Bael they were part of the group that Sika Madu appeared to trust more than most. While he was near her grave, Naberius made no comment on her passing.

Bael
It is not known what Naberius made of Bael taking his own life after he fell ill from the plague.

Paimon
Whether Paimon's attempt to murder Mikaela, son of Sika Madu, is known to Naberius is not known.

Marbas
While Marbas is not seen interacting with Naberius, as with this group of angels they presumably share the same goal.

Quotes
"They're coming this way! Dodge, you idiot!"

- Warning others of the incoming fire, and pushing Amon out of the way to save his life, yet costing him his own.

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.