God

A God in Seraph of the End is referred to in passing in the figure of speech sense and referred to as if an entity by characters. It is said that his throne is at The Sun. Having not been seen or heard from, God's existence and behaviour is implied from others' views and behaviour in response to what they know of him.

Appearance
Unseen, where seraphs may live with him on the Sun they have smoke, to charred wood like appearances, though whether the God appears as a fiery related being giving its environment remains unknown. God has been referred to as "he" by Sika Madu, and as "they" again by Sika Madu and another six-winged angel. Rather than an indication of a gender, "they" may be a means of addressing someone by a title as a means of deference if angels are unable to use personal terms when referring to God.

While it might not be literally speaking, it is mentioned that God has turned his back, and will not turn their eyes on someone. Additionally the words of sinners are said to not be able to reach God's ears. Based on this literal interpretation, it may indicate God is a humanoid figure with features such as eyes and ears.

Personality
According to Shikama Doji, a being who is unsympathetic to the suffering of humans and has been murdering a great number of them over years, god has a much more twisted personality than him. He is said to punish arrogance, not forgive suicide, and curse others. From others' accounts, God is implied to administer death related trials as part of his plan.

Fates worse than death were also used by God. One example is after one individual Sika Madu attempted to resurrect angels who had perished from a plague, God had apparently sanctioned seraphs to destroy the Tower of Babel that was to return them to paradise, and the seraph civilization with every living thing in it. Sika Madu's followers' souls were condemned to Hell never mind they had done nothing wrong, and worked tirelessly to gather light for God for so long. Further, Sika Madu himself was cursed as an undead, to be unable to die but only experience burning from sunlight for eternity on a barren planet.

A single non-violent trait was indicated by the words that God was supposedly looking forward to Sika Madu's return.

Prehistory
While he does not appear, God is mentioned by the King of Earth Sika Madu when he announced the progress of the satellite kingdom's efforts to return angels to the Sun, where God was said to await on their throne. He is mentioned when Paimon spoke to Bael that God was not forgiving of betrayal.

When Paimon was attempting to murder Mikaela, it is due to that God would notice him eventually. In discussion, God is mentioned when Paimon stated that he would punish the King, Sika Madu if Mikaela's forbidden existence was learned about. Where curing illnesses is forbidden it is stated by Paimon that God would punish Sika Madu and it would be far worse than simple death.

For God's anticipated punishment, it is said Sika Madu intended to endure it alone to protect Mikaela. God was also in Mikaela's mind when he was considering whether his own existence was a problem for his father. With Paimon and Mikaela having taken their lives, God was said to not be forgiving of suicide by Bael.

He is mentioned when Bael stated that Paimon wanted Sika Madu to return to God's side. Additionally regarding the deaths, they are seen as happening in accordance with God's plan where Bael felt it was a trial. God was referred to by Bael when he stated he never wanted anything of him. Believed to have a plan though, God's one was prepared to be followed by Bael. As Bael left with Paimon, that events could be all part of God's plan was raised as a thought.

That the source of God's power is light was known by Sika Madu. Returning to God's side was why light was gathered in the Tower of Babel. Stated that all light was God's power, it appeared the case that he had decreed that resurrection, apothanasia, and creation were taboo. That God punishes resurrection was why Sika Madu created Mikaela in secret, where it was believed it was done without his knowledge.

Spoken to directly (for the first observable time) God was unresponsive when Sika Madu displays the corpse of the created life Mikaela and asks if he has been forgiven. On whether he is testing the limits of Sika Madu's perceived arrogance it also questioned, as was the possibility that he was not even bothering to watch.

If God could communicate via the light Sika Madu looked up to then he did not respond. It was the same when Sika Mady stated that he would use Babel's light to resurrect Mikaela. If God was able to hear this he also would have heard that the light to resurrect all angels and extend their lives had been concentrated into seven keys held by Mikaela. Ever silent, God is referred to when Sika Madu stated he never graces him with an answer.

Mentioned, Sika Madu intended to hide from God's sight as he directed a homunculus named Yu to convert Babel's light into darkness to resurrect Mikaela and bring everyone back. He was on Sika Madu's mind when he is contemplating how there is no punishment, and asked if he permits this, or has not noticed.

On his orders or not, seraphs used their trumpets to target the homunculus who was darkening halos of light in Space, as well as blast their energy into Earth. Their punishment was delivered immediately upon a taboo being detected. God is mentioned by a humanoid angel who descends to Earth where Sika Madu is being fired on by seraph lightning. It was said that God was waiting for Sika Madu and that they looked forward to his return more than many others.

Apparently having approbated condemning Sika Madu's followers to Hell, and for ending Earth, it is said by the human-appearing angel that God has turned their back on Sika Madu. Additionally, God is mentioned again as someone who will not turn their eyes upon Sika Madu again.

After the seraph civilization has been obliterated and the seraphs that carried that out mean to return to paradise, there was a message intended for God from Sika Madu. Whatever the message was is not heard as the humanoid angel speaks that the words of a sinner do not reach God's ears.

Where Sika Madu has been burning for millennia on an empty Earth, it is said how he despises God for this. God is mentioned by him as his being is cursed. In thought, God is referenced again when Sika Madu is contemplating how at first he cursed their name before coming to accept what he done.

When Sika Madu is considering how to resurrect Mikaela to access the seven keys of light within him to restore others, God is the inspiration for how he could go about doing this. The best way in Sika Madu's mind is to copy God and it is stated that they made angels to collect light. While not mentioned at all, God's presence on the mind is indicated when Sika Madu is observing that he is not permitted to create angels, but is permitted to create humans.

Story
At Nagoya airport where Mirai Kimizuki is controlled by the The Fifth Trumpet who has brought Abaddon to the world, Kureto Hīragi comments that even if god himself is their enemy then humanity will prevail.

After Kureto answers that Tenri Hīragi called him an old god, a different god is stated by Shikama Doji to have a much more twisted personality than him.

The god may have been in mind when Yu is detailing that his and Mika's situation can be framed as a fight involved angel bosses and god bosses. God is mentioned by Mika who feels that it always administers punishment for revivification attempts where sacrifices are felt to be involved. After Guren with Shinya, then Sika Madu and Mikaela are envisioned, it is mentioned that Yu's goal is to not let God punish anybody.

Powers and Abilities
For the possibility of being omniscient there appears the impression by Sika Madu that activities can be hidden from god. Even when punishment was being enacted on a perhaps harder not to notice giant homunculus darkening all the light in a tower, God genuinely did not seem to notice that on Earth a life had been created which was one of the three most serious taboos to break.

Light is said to be the source of God's power, and given it is also the source of angels' lives it may be that God can create angels. It would be confirmed God indeed created angels to help gather light for him.

"The source of God's power and angels' life... ...Is light. Light can make miracles happen."

- God's light based powers of resurrection, apothanasia, and life creation.

It is possibly God, or seraphs that can transform angels into undead who could never die and instead experience burning from sunlight forever. With that, God is capable of granting immortality, albeit a cursed type. It is not clear if they planned for, or was aware that this curse could be circumvented should a being be able to produce darkness to shield them from light.

Shikama Doji
The King of Earth who God is implied to have had at his side at one point. His potential punishment of taboo actions weighs heavily on Sika Madu's mind, but does not deter his intent rather has him act to bypass it.

Although it was said that he was awaiting Sika Madu's return, God seemingly authorized the destruction of the kingdom he ruled and had him cursed as an undead to suffer burning for eternity. Said to have turned his back on Sika Madu where he would not look upon him again, it is possible God took this approach earlier than announced as he did not react to Sika Madu revealing he had broken a taboo by creating life.

Paimon
That God administered divine punishment for creating life was the reason Paimon sought to kill Mikaela so as to spare Sika Madu punishment for doing so. The rules God enforced had this indirect effect on an angel.

Bael
God is seen by this angel as giving trials such as death as part of his plan. For the powers he had, they were not desired by Bael. If God had a plan it was willing to be followed by an angel fine with following whatever orders.

Mikaela
That God was said to mean to punish Mikaela's father for creating him heavily impacted his fate. To avoid Sika Madu from being punished from God, Mikaela took his own life. It may not even be aware of Mikaela's creation however as no measurements were taken upon him coming into being, neither when his body was shown.

Seraphs
Sharing light as the source of their power, God created angels to gather it for him. There appeared to be different views depending on the faction of seraphs, God did not treat them as a uniform group. Some were spread across satellite kingdoms where it seemed the case they had to collect a certain amount of light in towers before they could return to paradise.

While they shared a power they could both used, God had set taboo areas that angels were not to dabble in. The three most serious ones all concerned life. God had forbade angels from creating life, seeking to delay death, or resurrect those who had passed away. A very select number of seraphs who possessed trumpets were perhaps deployed to enact punishment against other angels that had broken taboos. God had no qualms with having some seraphs destroying others and the civilizations they lived in.

Vampires
In perhaps having the power to change an angel into a being that would burst into flame upon contact with fire, God had formed Sika Madu into the precursor of vampires. God's act would result in Sika Madu being able to create a very small number of vampires, who would spread to become the dominant force over humans by the present day.

Saitō
If it was felt by Saitō, a second progenitor vampire of later ages that God was behind everything negative that Shikama Doji experienced, then the God indirectly flipped Saito's goal of undermining the First to instead sympathizing with him.

Humans
If is at God's directive then it has had seraphs inflict the Catastrophe that devastated Earth in modern times.

Kureto Hīragi
In Kureto Hīragi who serves as the Lieutenant General of the Japanese Imperial Demon Army, it would find a human willing to enact Seraph Experiments to apparently control certain Trumpets of the Apocalypse. For any possible connection, the god would find someone willing to oppose it if it meant the survival of humanity.

Yūichirō Hyakuya
On account of its vengeful nature, God can expect Yu to be opposed to any intent to punish others for resurrection.