Supreme Deity

The Supreme Deity「最高神」 is the ruler and creator of the Goddess Clan, as well as the one who granted the Graces to the Five Archangels as well as the Holy Regalia. She also is the mother of the original Yuki.

The Supreme Deity was created by Chaos along with the Demon King and the Sacred Tree after the world was given birth by Chaos. The Supreme Deity then created the Celestial Realm and the Goddess Clan in her image. However, when Chaos created the humans, the race closest to it and its favorite creation, both the Supreme Deity and the Demon King were filled with jealousy and apprehension, fearing that the love and respect that their own respective races gave to them would be stolen by their own creator, Chaos. Thus, the two gods joined together and sealed Chaos away, allowing them to be the most powerful entities in the world.

The Supreme Deity became the ruler of the Goddess Clan and created the Graces from her own power in order to give it to the four strongest of the Goddesses who pledged their loyalty to her, thus forming the Four Archangels. She also had a child named Elizabeth, who inherited part of her power and was on rival with the Four Archangels.

The Supreme Deity's army constantly clashed against the Demon King's, but their forces were too equal in power and thus a fragile treaty of peace was formed despite their opposing natures. However, the peace was unfairly broken by her own subjects, who even slaughtered innocent members of the Demon Clan. Whether she was involved in this case or not, these actions made both rulers fall in rivalry again.

After the betrayal of the leader of the Commandments Meliodas for his alliance with his lover, her own daughter Elizabeth, and the death of two of the Ten Commandments at the latter's hand during his escape, her clan instigated with the humans, Fairy, and Giant Clan in order to finally defeat the Demon Clan. These events were known as the Holy War, though the Supreme Deity's feelings towards her daughter's actions are unknown.

Around this time, news of a miraculous human girl from Belialuin who possessed infinite magic soon spread to both the Celestial Realm and the Demon Realm, resulting in the Supreme Deity trying to persuade the girl to join forces with the Goddess Clan in help defeating the Demon Clan, along with the Demon King doing the same. When the girl told them she would follow the one who gave her the better gift, the Supreme Deity gave her resistance to dark curses, including the Commandments of the Demon King. However, when the girl deceived them by taking both their blessings, the Supreme Deity and the Demon King in their fury destroyed Belialuin by making it rain fire and lightning and unleashing poison mists and fogs upon the land completely annihilating Belialuin and its inhabitants.

During the last few days of the Holy War, the Supreme Deity and the Demon King had lost their patience of their children's repeated defiance of the laws of their clan, such as saving the lives of two Commandments in the middle of a war on Elizabeth's case. The former rivals decided to work together, fighting against Meliodas and Elizabeth, effortlessly killing them and cursing them for eternity. The Supreme Deity cursed Meliodas with immortality as his punishment, reviving him every time he died, in exchange for his emotions being consumed more and more by the Demon King until his son would return to be the bloodthirsty demon he once was.

Abilities and Equipment
As their ruler, the Supreme Deity is terrifyingly powerful, being the most powerful goddess in existence. A testament to her immense strength is having ten wings that further indicates her strength is far above all other goddesses, as the most seen are four wings possessed by the four Archangels and the original Elizabeth. According to Meliodas, she is the only known being who is equal in power to the Demon King. As Meliodas stated only herself or the Demon King or someone as powerful or superior to them in power can lift the curses that he and Elizabeth were cursed with, showing further testament to her immense power. While she rarely fights, the Supreme Deity's might in battle is terrifying, as evidenced by her ability to easily overpower and kill Meliodas in the Holy War of which Meliodas claims that he was utterly powerless to fight back against Elizabeth's mother.

Abilities

 * Grace「恩寵 Onchō」: The Supreme Deity can create a set of the ability which enhances the power to those she sees fit while giving them an additional power related to nature. However, it cannot be given to humans as it would rip their body apart, immediately or not.
 * Nature Manipulation: The control over the elements, being powerful enough to cause a fog of death along with fire and lightning capable of killing all Belialuin's inhabitants of along with the Demon King.
 * Dark Curses Immunity: This negation spell grants immunity to any type of dark curses, including even the Demon King's Commandments. It was used on Merlin and all of the Four Archangels.
 * Curses: The Supreme Deity is exceptionally accomplished in the use of curses, being capable of developing and casting highly unique yet powerful and durable spells.
 * Immortality「の Eien no Sei; literally meaning "Eternal Life"」: A curse that revives the victim without fail regardless of the means of death, including suicide or getting killed, no matter how many times they die. It additionally prevents the victim from dying of old age. In exchange for the infinite number of revivals, the victim's emotions are slowly drained to nourish the user. The only way to dispel the curse is to get a power equivalent to the Demon King or the Supreme Deity herself, if not superior. The only known victim of the curse is Meliodas.
 * Flight: As a goddess, the Supreme Deity possesses wings for flight. She has the most amount of pairs by far.
 * Power of Creation: The Supreme Deity created both her own dimension separate from the main world, the Celestial Realm and the immensely powerful Goddess race on her own using her own raw power, further giving credence to her godly power.